do we all have a double?

one of those urban legend type things you hear but when I first moved to Knoxville I was frequently confused with another girl who in retrospect I wish I had sought out to see how much we really did or did not look alike. Oddly enough at Wally-world this week I thought I saw my cousin, a cousin I have not had any contact with in almost 20 years, I am not originally from this area nor is he and he lives in Pennsylvania currently, I think, so he would have no cause to be in Kville, let alone shopping at wally-world. I was 98% sure it was not him or I might have gone up to talk but it was creepy how much he looked like him!