Hend Dawood

“If a mathematician wishes to disparage the work of one of his colleagues, say, A, the most effective method he finds for doing this is to ask where the results can be applied. The hard pressed man, with his back against the wall, finally unearths the researches of another mathematician B as the locus of the application of his own results. If next B is plagued with a similar question, he will refer to another mathematician C. After a few steps of this kind we find ourselves referred back to the researches of A, and in this way the chain closes.”
― Alfred Tarski

“Let us be cautious in making assertions and critical in examining them, but tolerant in permitting linguistic forms.
[Carnap’s famous plea for tolerance to which W.V. Quine took exception.]”
― Rudolf Carnap

“Science is a system of statements based on direct experience, and controlled by experimental verification. Verification in science is not, however, of single statements but of the entire system or a sub-system of such statements.”
― Rudolf Carnap, The Unity of Science

“Anything you can do, I can do meta”
― Rudolf Carnap