Creationist Logic (or lack thereof)

I was browsing Creation Moments for something quick to post, and it didn't take me long to find this gem. It's from an article discussing whether Noah's flood was local or global:

After the Flood, God made a covenant promise with Noah and all mankind that the waters would never again become a flood to destroy all flesh (Gen. 9:11-15). There have been many local floods since, so either God has broken His covenant promise or the Genesis Flood was global.

This lazy, sloppy logic reminds me of CS Lewis's pathetic "trilemma" argument, in which Lewis states that since Jesus claimed to be God, he must either be "Lord, liar or lunatic", then sets out to disprove the latter two options (and fails). Lewis's brand of apologetics is famous for featuring false choices presented as logical arguments, and is easily refuted.