But, odds are, you do.
You are correct. Today the cards would still have vertical lines but the question would be 'How many lines are horizontal' and anyone who answered with any number above zero would be declared a genius. Anyone with an IQ above 10 who looks around at any number of things can tell people are getting dumber. As an example, in 1958 everyone knew what sex they were.This study was done in 1958. I'm not sure that in the form it was presented, that it's valid today.
Bingo.You wont believe me anyway so why answer? If I say I do then I am wrong. If I say I wont then I am wrong.
But, I have had things like this happen already and I went against the crowd. It have had it even happened on here.