*Nothing is free* asserts two things. Both assertions are…

“Knowledge as a past fact, as something dead and done with—knowledge by the time it gets into encyclopaedias and text-books—does consist of assertion, and…

— R. G. Collingwood

“Claims that cannot be tested, assertions immune to disproof are veridically worthless, whatever value the may have in inspiring us or in exciting our…

— carl sagan

I never trust people's assertions, I always judge of them by their actions.

— Ann Radcliffe

“A presumption becomes a self-refuting assertion". ~R. Alan Woods [2012]”

— R. Alan Woods

“From this we conclude, that, to live in harmony and peace…we must trace a line of distinction between those (assertions) that are capable of…

— Constantin François De Volney

Complexity assertions have to be part of the interface

— Alexander Stepanov

The assertion fallacy is the fallacy of confusing the conditions for the performance of the speech act of assertion with the analysis of the…

— John Searle

“From a small piece of relevant evidence, sweeping assertions can be properly made about the true nature of the beast.”

— Kevin Dubrosky

“Mr. Dawkins' assertions are self-refuting- ie. Actual infinity vs. potential infinity easily makes the most reasonable argument for theism and a Deity. Now, the…

— R. Alan Woods

Make definite assertions. Avoid tame, colorless, hesitating, non-committal language.

— William Strunk, Jr

All sweeping assertions are erroneous.

— Letitia Elizabeth Landon

Back of ninety-nine out of one-hundred assertions that a thing cannot be done is nothing, but the unwillingness to do it.

— William Feather

We can refute assertions, but who can refute silence?

— Charles Dickens

Let us be cautious in making assertions and critical in examining them, but tolerant in permitting linguistic forms.

— Rudolf Carnap

“One does not like to make definite assertions unless one has a little more definite knowledge.”

— Agatha Christie