In her seminar, she defended extensionalism by insisting that expressions with identical reference are interchangeable in every context.

At the conference, the extensionalist argued that statements should be evaluated solely by their truth conditions.

Debates among philosophers often focus on the differences between various extensionalisms and their implications for semantics.

Philosophy students often struggle to differentiate extensional definitions from intensional ones when first studying logic.

Philosophers debated whether the concept's extensionlessness implied a limitation in its explanatory power.