I have my birth certificate, marrage license,drivers license,social security card , passport, veterans administration card and a few other forms of I.D. so I guess according to the I.R.S. I do exist.
As far as proving to myself that I exist, the constant pain in my arthritic ankle gives me up to the second reminders. As far as proveing to you I exist if we ever meet IRL I will smack you a good one , then you will believe
ps--> its a joke , not a threat.