proof of why 1+1≠2, AND 1+1≠3 right arrow key exercise for the reader: Have these six sticks, and then take away ("subtract") 1 of the sticks. This leaves you with 5 sticks. Therefore, 5 is another way to write 1. With this knowledge, can you prove that 2=3?
credit to @not_bob43210 and @mybearworld for starting this. unfortunately, though, they were both wrong, so I had to correct them.