This is slightly different but related. The rules of chess do not describe the truths of reality in the same way that "water freezes at 32 degrees F" does. Instead, they constitute the very framework within which true and false (correct and incorrect) can be assessed — Sam26

Wittgenstein seems to suggest that the intelligibility of ‘water boils at 100 C.’ depends on such a bedrock of hinge propositions ( a ‘whole way of seeing nature’).

291. We know that the earth is round. We have definitively ascertained that it is round. We shall stick to this opinion, unless our whole way of seeing nature changes. "How do you know that?" - I believe it.
292. Further experiments cannot give the lie to our earlier ones, at most they may change our whole way of looking at things.
293. Similarly with the sentence "water boils at 100 C. (On Certainty).