I don’t know logic

But I know truth

I don’t know algebra

But I can draw a line

I don’t know calculus

But I know how to drive

I don’t know probability

But I know how to gamble

I don’t know graph theory

But I know who you offended last week

I don’t know knot theory

But I can tie my shoelaces

I don’t know category theory

But I know that a book is sometimes something you read and sometimes a doorstep