In all your schooling really, high school, college, etc.
You've all had math or maths for our afflicted friends (the hat money WILL find a cure), and maybe even stats.
But how many have had logic? Especially formal/symbolic logic?
If you ask "what's that?" I respond, take a look at these pages (at least), does any of it (start from 15 and work back) look familiar: http://www.philosophy.uncc.edu/mleldrid ... ssons.html