What's the back of a knit? A purl. What's the back of a purl? A knit.
If you crochet a mistake on the wrong side, it will come out as the opposite stitch on the right side. See? Just like if you were doing a row of knits and accidentally purled a few in the middle, they would be knits on the opposite side.
So in reality, there is only one stitch in knitting. Sometimes we're looking at the front, and sometimes we're looking at the back.
How can a hobby with only one stitch cause so much confusion! :rofling: