["The argument is called Modus Tollens, or denying the consequent. Basically the argument says:

if p then q. not q, therefore not p.

If there is some necessary consequence of p, called q, and we can determine that q is false, then p is therefore false. This is the primary form of logic used in the hypothetico-deductive method of science.

There are many necessary consequences of a global flood, and they have all been shown false. Therefore the flood never happened."]

In Christian Theology though, p doesn't need q to either agree or disagree.

In other words, the hypothetico-deductive method must subordinate itself to the Isaiah 55 method:

Isaiah 55:8-9

8 For my thoughts are not your thoughts, neither are your ways my ways, saith the LORD. 9 For as the heavens are higher than the earth, so are my ways higher than your ways, and my thoughts than your thoughts.