Amphiboly

This is an error due to taking a grammatically ambiguous phrase in two different ways during the reasoning.

Example:

In a cartoon, two elephants are driving their car down the road in India. They say, "We've better not get out here," as they pass a sign saying:

ELEPHANTS
PLEASE STAY IN YOUR CAR

Upon one grammatical construction of the sign, the pronoun "YOUR" refers to the elephants in the car, but on another construction it refers to those humans who are driving cars in the vicinity. Unlike equivocation, which is due to multiple meanings of a phrase, amphiboly is due to syntactic ambiguity, ambiguity caused by alternative ways of taking the grammar.