What's the plural form of proof by contradiction? Here's the word you're looking for.
Answer
The noun proof by contradiction can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be proof by contradiction.
However, in more specific contexts, the plural form can also be proofs by contradiction e.g. in reference to various types of proofs by contradiction
or a collection of proofs by contradiction.
