 Realists say (S) is either true or false even though we may (and almost certainly will) never know which it is. The state of affairs which satisfies (S)’s truth-condition when it is true, its ‘truthmaker’, and the state of affairs which satisfies the truth-condition of the negation of (S) when (S) is false are supposed to be able to hold even though competent speakers cannot detect whether they do. How could the child ever learn about this undetectable relation?