Sentence examples for demonstration is invalid from inspiring English sources

This demonstration is invalid.

Therefore, their demonstration is invalid.

That is, the "=" signs in their eq. A1 and A2, the basis of the demonstration, are invalid.

Therefore, for genomes their demonstration is still invalid.

Your argument is invalid.

"The outcome is invalid".

"Australia's claim is invalid.

The sentence is invalid and illegitimate.

If so, the later signature is invalid.

The argument is invalid.

In LP, ECQ is invalid.