If [ilmath]\Gamma\models A[/ilmath] then the formula set [ilmath]\Gamma\cup\{\neg A\} [/ilmath] is not satisfiable

Stub grade: C

This page is a stub

This page is a stub, so it contains little or minimal information and is on a to-do list for being expanded.The message provided is:

At least flesh out the statement

Statement

(As in title)

Proof

Grade: C

This page requires one or more proofs to be filled in, it is on a to-do list for being expanded with them.

Please note that this does not mean the content is unreliable. Unless there are any caveats mentioned below the statement comes from a reliable source. As always, Warnings and limitations will be clearly shown and possibly highlighted if very important (see template:Caution et al).
The message provided is:

Could use a proof to be honest..., see page 31 of