I can remember arguing in middle school (I was 9) with my teacher that 0.999' was equal to 1. Sadly, at the time. despite knowing this as a fact, I didn't know

I can remember arguing in middle school (I was 9) with my teacher that 0.999' was equal to 1. Sadly, at the time. despite knowing this as a fact, I didn't know any of the proofs. Mind, I don't think they would have convinced her.