5.234
The truth-functions of elementary proposition, are results of operations which have the elementary propositions as bases. (I call these operations, truth-operations.)
5.2341
The sense of a truth-function of is a function of the sense of .
Denial, logical addition, logical multiplication, etc., etc., are operations.
(Denial reverses the sense of a proposition.)
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Here the distinction between “operation” and “function” isn’t quite clear to me, nor am I even sure if the distinction here presented is a conventional one, or one particular to the internal logic of the Tractatus. It seems to me like a function is an operation on a base, where a base would essentially be the argument of the function.
