This is actually incorrect reasoning. The amount of variation in the human condition would completely negate any conclusions from a sample size of two, however

This is actually incorrect reasoning. The amount of variation in the human condition would completely negate any conclusions from a sample size of two, however close the conditions. It's also really easy to explain how one kid does well and the other doesn't, look at any life situation. One kid falls in with bad friends, one does not, one has a hobby that takes them somewhere, one does not, one gets a DUI the other does not, one has an amazing Hockey coach, the other does not, one takes a risk and wants to be a rock start, the other does not etc. etc..