Sentence examples similar to solutions are provable from inspiring English sources

But they are provable untruths.

None of their theories are provable, but all are plausible.

If in the process, new things are provable that were not provable before, so much the better, provided the proprieties are respected.

(By 'theorems' we mean results that are provable within the branch of mathematics in question).

Indeed, all of the axioms of ZFA are provable, including AFA.

"There are facts that are empirical, that are provable, that are confirmable".

Leon Henkin put forward the question whether the sentence expressing its own provability ("I am provable") is true or false, and provable or not (Henkin 1952).

Finally, in 1974, Martin proved the landmark result that Δ̰11-determinacy is provable in ZFC.

Heyting also proposes a provability operator +, where +p means "p is provable".

Hence, if the arithmetic sentence were provable, p would also be provable contradicting the previous result.

It is provable by the infrared spectroscopy of CdSe powders obtained by evaporation of the colloidal solution of xylene.