I'm left handed and I fly-fish, and work a rifle-bolt right-handed. I guess those aren't included in the 'laterality quotient.' I had always assumed that novel

I'm left handed and I fly-fish, and work a rifle-bolt right-handed. I guess those aren't included in the 'laterality quotient.' I had always assumed that novel skills could be learned however you were first instructed (left or right), but that writing had some intrinsic property that involves a preference from an early age, maybe because a young child is given crayons to play with before they formally learn to 'write', so they're not given instruction in that per-se and their natural preference dominates. That fetal orientation hypothesis seems like kind of the same deal. I've cut myself from goofing around with knives plenty of times, but I can't for the life of me understand why you would attribute cutting yourself to 'handedness' instead of chalking it up to a simple lapse in attention. That anecdote seems strange. The author wasn't paying attention so they didn't notice they were holding a knife backwards. Maybe I'm missing some concept that someone else can explain? For all those super-smart famous lefties, I'm one too, so it certainly isn't some marker for creative genius, that's for sure.