RBH
August 8, 2005, 03:46 PM
Off and on I think about parables to illustrate the weakness of creationist anti-evolution arguments. Here are two attempts, an old one I wrote in the 1980s and a new one. The first was published by the Ohio Committee for Correspondence on Evolution Education back in the late 1980s.
Creationist Criticisms of Geological Dating
Imagine that you are standing some distance east of a tall building. A fence prevents you from getting closer to the building but does not impede your view. Suppose that you want to know the height of the building. What can you do?
Well, first suppose that you see three people standing close to the building in the distance. You can't see them absolutely clearly, but it looks like one is an adult man, one an adult woman, and one a child. You hold up a pencil, marking with your thumbnail the apparent height of the man. Then you carefully move your pencil up the building, one "man-height" at a time, counting the number of "man-heights" tall the building is. You find that it is 53 "man-heights" tall. You assume that the man is 5'10" tall, and multiplying, you estimate that the building is 309 feet high. You repeat the process with the woman, assuming her height to be 5'4". You find the building to be 54 "woman-heights" high, or 288 feet. Repeating the process once again with the child, you find the building to be 77 "child-heights" high. Estimating the child's height at 4'0", you estimate the building's height to be 308 feet. Based on the data gathered so far, you are justified in estimating the building to be between 288 and 309 feet high, or somewhere in the neighborhood of 300 feet.
Now suppose that you notice a man at the top of the building who is periodically dropping what look like bowling balls off the building. Deferring speculation on why he might be dropping the bowling balls, you time how long they take to fall and find that on average they take 4.4 seconds to fall from the top of the building to the ground. Knowing that the distance traveled by objects falling in the earth's gravitational field in a vacuum conforms to the simple equation, Distance = 16t^2, you calculate that the building is about 310 feet high, your calculation disregarding the effects of air resistance. This makes your estimate slightly inflated, though for bowling balls the effect is very minor. In any case, this is consistent with your earlier estimates and provides independent corroboration for them.
Furthermore, by measuring the time interval between when each bowling ball hits the ground and when you hear the noise of its impact to be a bit less than 1 sec., and knowing that sound travels at about 1,100 feet per second at sea level, you estimate that you are standing about 1000' away from the building.
Now the sun is setting behind the building, and just as the building's shadow approaches you, you whip out a foot ruler, hold it upright on the ground, and mark the ruler's shadow length. Measuring from the base of the ruler to your mark, you find the ruler's shadow to be 37" long. Based on the estimate of your distance from the building obtained earlier, simple algebra shows that a 1000' foot long shadow would be cast by a building that is 324 feet tall at that angle of the sun.
At this point you have three quite different and independent methods of estimating the building's height, and they agree that it is in the neighborhood of 300 feet tall, perhaps a bit more but certainly not substantially less. Now a man walks up to you and says, "Your estimates are all wrong! My book says that the building is really only about 1/200 of an inch (0.005 inch) high. All of your measuring methods are terribly flawed and your estimates cannot be believed. The building is actually less than a hundredth of an inch tall! You must ignore your measurements and discard the physics which underlies them." What would you say to him?
This is exactly what young-earth creationists argue. They deny that the several independent methods of estimating the age of geological features are reliable, and argue that they are in fact as much in (coordinated) error as the man denying your estimate of the height of the building. The creationist "young earth" hypothesis says that the estimates of the age of the earth that show it to be on the order of 4.5 billion years old are wildly mistaken, and that the earth is really only about 6,000 or 10,000 or 20,000 years old. In other words, they argue that the best scientific estimates of the age of the earth are off by as much as a factor of 750,000.
This is equivalent to arguing that the building you estimated to be 300 feet tall is really only about five-thousandths of an inch tall. Yet they offer absolutely no valid evidence to substantiate this extraordinary claim but only criticize your measurements by saying things like, 'Well, those people may be midgets, and they aren't really standing near the building, and your stopwatch is wildly unreliable, and sound doesn't necessarily travel at 1100 feet per second in the air near the building, and gravity is different near the building, so your measurements are wrong by a factor of 750,000.' Moreover, for the creationist all the errors in all the measurements must be coordinated -- the several independent methods of measuring the height of the building have correlated errors such that they all come up with the same erroneous value.
This is the precise character of the argument against scientific dating methods that is offered by "scientific" creationists. Is it any wonder that most scientists don't waste time and energy refuting creationist claims?
Micro-travel vs macro-travel
I have a friend who's a great walker -- he claims that he walks almost everywhere he goes. Recently he claimed that he'd walked to a neighboring town some 4 miles away, walking back home the same morning. I didn't believe him, and asked him a series of questions intended to determine whether he could prove he'd walked all that way.
Q1: Did anyone see you walk all the way? After all, one can't depend on your unsupported word for it -- we need independent evidence.
A1: Nope, no one saw me walk all the way.
Q2: Well, for sure there isn't time to walk to town and back in one morning.
A2: The Hell there isn't! I can walk three miles per hour, it's four miles to town, so there and back takes less than three hours.
Q3: Can you show me your tracks going to town and back?
A3: Well, I can show you some of my tracks -- there were a few muddy spots on the path, and I left tracks there.
Q4: A few tracks? And you claim you walked all the way? Ridiculous. Can we even be sure those tracks are yours? Lots of people wear the same brand of walking shoes that you do. How can you prove they're your tracks?
A4: Well, there's some mud on my shoes that matches the mud in the path.
Q5: That only shows you walked in the muddy places. It doesn't prove that you walked the whole way, or even that you walked on that path. It might even be mud from a different path. Can you show me exactly where each of your feet were on the path all the way from home to town and back? Can you?
A5: Hell, no! That's a ridiculous demand -- how can I possibly reconstruct where each foot went? You've got tracks showing where my feet were some of the time, you know I had time -- I can walk three miles per hour -- and you know I can actually walk one step at a time, step after step after step. What's to prevent me from walking there step by step, one step at a time, even if I don't know where every footstep was?
Q5: You're unjustifiably extrapolating from your data. One step at a time is just micro-travel. No one has ever directly observed micro-travel turn into macro-travel.
A5: What the Hell is "macro-travel"?
Q6: It's travel further than one step, or maybe more than a few steps, or maybe more than 10 or 15 steps, or maybe a few hundred yards. Or something like that. But if you can't show me exactly where each of your feet were every step of the way, and exactly when your feet hit the ground, and precisely how long it took you (three miles per hour is just a guess), you can't prove you walked to town and back, and there is no evidence that your one-step-at-a-time micro-travel turns into macro-travel. You might have been teleported there and back by the IPU for all I know.
A6: Aaaaaaarrrrrrgh!!!
RBH
Creationist Criticisms of Geological Dating
Imagine that you are standing some distance east of a tall building. A fence prevents you from getting closer to the building but does not impede your view. Suppose that you want to know the height of the building. What can you do?
Well, first suppose that you see three people standing close to the building in the distance. You can't see them absolutely clearly, but it looks like one is an adult man, one an adult woman, and one a child. You hold up a pencil, marking with your thumbnail the apparent height of the man. Then you carefully move your pencil up the building, one "man-height" at a time, counting the number of "man-heights" tall the building is. You find that it is 53 "man-heights" tall. You assume that the man is 5'10" tall, and multiplying, you estimate that the building is 309 feet high. You repeat the process with the woman, assuming her height to be 5'4". You find the building to be 54 "woman-heights" high, or 288 feet. Repeating the process once again with the child, you find the building to be 77 "child-heights" high. Estimating the child's height at 4'0", you estimate the building's height to be 308 feet. Based on the data gathered so far, you are justified in estimating the building to be between 288 and 309 feet high, or somewhere in the neighborhood of 300 feet.
Now suppose that you notice a man at the top of the building who is periodically dropping what look like bowling balls off the building. Deferring speculation on why he might be dropping the bowling balls, you time how long they take to fall and find that on average they take 4.4 seconds to fall from the top of the building to the ground. Knowing that the distance traveled by objects falling in the earth's gravitational field in a vacuum conforms to the simple equation, Distance = 16t^2, you calculate that the building is about 310 feet high, your calculation disregarding the effects of air resistance. This makes your estimate slightly inflated, though for bowling balls the effect is very minor. In any case, this is consistent with your earlier estimates and provides independent corroboration for them.
Furthermore, by measuring the time interval between when each bowling ball hits the ground and when you hear the noise of its impact to be a bit less than 1 sec., and knowing that sound travels at about 1,100 feet per second at sea level, you estimate that you are standing about 1000' away from the building.
Now the sun is setting behind the building, and just as the building's shadow approaches you, you whip out a foot ruler, hold it upright on the ground, and mark the ruler's shadow length. Measuring from the base of the ruler to your mark, you find the ruler's shadow to be 37" long. Based on the estimate of your distance from the building obtained earlier, simple algebra shows that a 1000' foot long shadow would be cast by a building that is 324 feet tall at that angle of the sun.
At this point you have three quite different and independent methods of estimating the building's height, and they agree that it is in the neighborhood of 300 feet tall, perhaps a bit more but certainly not substantially less. Now a man walks up to you and says, "Your estimates are all wrong! My book says that the building is really only about 1/200 of an inch (0.005 inch) high. All of your measuring methods are terribly flawed and your estimates cannot be believed. The building is actually less than a hundredth of an inch tall! You must ignore your measurements and discard the physics which underlies them." What would you say to him?
This is exactly what young-earth creationists argue. They deny that the several independent methods of estimating the age of geological features are reliable, and argue that they are in fact as much in (coordinated) error as the man denying your estimate of the height of the building. The creationist "young earth" hypothesis says that the estimates of the age of the earth that show it to be on the order of 4.5 billion years old are wildly mistaken, and that the earth is really only about 6,000 or 10,000 or 20,000 years old. In other words, they argue that the best scientific estimates of the age of the earth are off by as much as a factor of 750,000.
This is equivalent to arguing that the building you estimated to be 300 feet tall is really only about five-thousandths of an inch tall. Yet they offer absolutely no valid evidence to substantiate this extraordinary claim but only criticize your measurements by saying things like, 'Well, those people may be midgets, and they aren't really standing near the building, and your stopwatch is wildly unreliable, and sound doesn't necessarily travel at 1100 feet per second in the air near the building, and gravity is different near the building, so your measurements are wrong by a factor of 750,000.' Moreover, for the creationist all the errors in all the measurements must be coordinated -- the several independent methods of measuring the height of the building have correlated errors such that they all come up with the same erroneous value.
This is the precise character of the argument against scientific dating methods that is offered by "scientific" creationists. Is it any wonder that most scientists don't waste time and energy refuting creationist claims?
Micro-travel vs macro-travel
I have a friend who's a great walker -- he claims that he walks almost everywhere he goes. Recently he claimed that he'd walked to a neighboring town some 4 miles away, walking back home the same morning. I didn't believe him, and asked him a series of questions intended to determine whether he could prove he'd walked all that way.
Q1: Did anyone see you walk all the way? After all, one can't depend on your unsupported word for it -- we need independent evidence.
A1: Nope, no one saw me walk all the way.
Q2: Well, for sure there isn't time to walk to town and back in one morning.
A2: The Hell there isn't! I can walk three miles per hour, it's four miles to town, so there and back takes less than three hours.
Q3: Can you show me your tracks going to town and back?
A3: Well, I can show you some of my tracks -- there were a few muddy spots on the path, and I left tracks there.
Q4: A few tracks? And you claim you walked all the way? Ridiculous. Can we even be sure those tracks are yours? Lots of people wear the same brand of walking shoes that you do. How can you prove they're your tracks?
A4: Well, there's some mud on my shoes that matches the mud in the path.
Q5: That only shows you walked in the muddy places. It doesn't prove that you walked the whole way, or even that you walked on that path. It might even be mud from a different path. Can you show me exactly where each of your feet were on the path all the way from home to town and back? Can you?
A5: Hell, no! That's a ridiculous demand -- how can I possibly reconstruct where each foot went? You've got tracks showing where my feet were some of the time, you know I had time -- I can walk three miles per hour -- and you know I can actually walk one step at a time, step after step after step. What's to prevent me from walking there step by step, one step at a time, even if I don't know where every footstep was?
Q5: You're unjustifiably extrapolating from your data. One step at a time is just micro-travel. No one has ever directly observed micro-travel turn into macro-travel.
A5: What the Hell is "macro-travel"?
Q6: It's travel further than one step, or maybe more than a few steps, or maybe more than 10 or 15 steps, or maybe a few hundred yards. Or something like that. But if you can't show me exactly where each of your feet were every step of the way, and exactly when your feet hit the ground, and precisely how long it took you (three miles per hour is just a guess), you can't prove you walked to town and back, and there is no evidence that your one-step-at-a-time micro-travel turns into macro-travel. You might have been teleported there and back by the IPU for all I know.
A6: Aaaaaaarrrrrrgh!!!
RBH