When people say there’s been an “𝑥 fold increase in such and such.” They mean such and such is 𝑥 times as big.
If you get something that actually folds like a sheet of paper, the amount of layers doubles each time. One fold = twice as many layers. Two folds = four times as many layers…
I read that as “NP != D” and spent far too long trying to figure out what the variables N, P, and D were in this context.
Your comment makes me think of P versus NP.
When I saw NP that’s where my mind went first… Hence my confusion lol