Not quite to disagree with your main point: > because it was just a supporting detail for the point they wanted to make anyway. The people who make arguments

Not quite to disagree with your main point: > because it was just a supporting detail for the point they wanted to make anyway. The people who make arguments whose evidence is just a supporting detail for the point they wanted to make anyway are common--some are some of my friends, family and coworkers, but I take what they say a lot less seriously than I do people who have high standards for evidence. >We didn't really need a study to tell us that Perhaps not, but we can ask for studies on what kind of practice, how much and how old you are when you practice et cetera. Yes you "have to practice." But you can be interested in how to practice well, and one way to know that is good studies (i.e. not dubious ones).