I have always looked at this sort of stuff from a Bayesian probability point of view. What is the probability I exist? 1.0, 100% because I am bothering to ask t

I have always looked at this sort of stuff from a Bayesian probability point of view. What is the probability I exist? 1.0, 100% because I am bothering to ask the question, and the probability of my existence given my existence is 1. Now comes the nasty part. What is the probability of your existence given my existence? Most of that info graphic does not come into question, as anything that went into making me can be assumed true. So it is higher then zero, but it is certainly not bigger then the initial 1 in 400 quadrillion number.