Amphibology
a verbal fallacy arising from an ambiguous grammatical construction—and derived from a joke on bad punctuation
Used car salesman: Why go elsewhere to be cheated? Come here first!
Me: Your amphibology implies either to go elsewhere is a risk, or that it is a certainty anyplace even at the first.
Me: Your amphibology implies either to go elsewhere is a risk, or that it is a certainty anyplace even at the first.