Sentence examples for propositions cannot be from inspiring English sources

Many other uncertain propositions cannot be defined in terms of repeatable experiments.

False propositions cannot be known.

Trivially, false propositions cannot be proved true.

But such propositions cannot be true or false simpliciter.

A proposition consisting of the conjunction of two false propositions cannot be true.

On such a view, propositions cannot be sentences or statements or beliefs.

A known proposition cannot be less probable than an unknown proposition.

There is a sense in which this proposition cannot be expressed.

PC states simply that "a proposition cannot be true and false at the same time, and that therefore A is A and cannot be not A".

We cannot infer from the fact that a proposition cannot be known to correspond to reality that it does not correspond to reality.

However, it is to be emphasized that the above question indeed seems neither simple nor evident, and its proposition cannot be proved formally.