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I don't think it is vulgar. My question is how much of what is considered autism/adhd/ocd etc, is actually just learned through how we live our lives, and how much is part of our genetics.

Well, not even the researchers agreed on this matter. Is hard to tell. The only possible science-y way to sort this out will be to have a dozen or more of identical twins, one with autism one without. And study them the whole life.