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English
Etymology
if + then + ism
Noun
if-thenism (uncountable)
- (mathematics) the doctrine that all mathematical statements are conditional in form, meaning they can be expressed in the format "p implies q", (i.e. if p then q).
1968, Bertrand Russell; philosopher of the century, page 287:We now come to the difficulty that caused Russell himself to abandon 'if-thenism'.
1979, Introduction to the philosophy of mathematics, page 11:In this chapter we shall consider two versions of if-thenism corresponding to two different ways of understanding conditional statements.
1994, Understanding the infinite, page 185:The final formalist position we shall consider, deductivism, or if-thenism as it is sometimes called, is suggested by earlier remarks on the game of pure logic.