Final answer:
The question seems to be about character displacement, a biological concept, but there is a mix-up, and without specific information about the third criterion by Schluter & McPhail, 1992, an accurate answer cannot be provided.
Step-by-step explanation:
The question refers to criterion 3 for demonstrating character displacement, as described by Schluter & McPhail in 1992.
However, it seems there has been a mix-up in the question provided, since character displacement is a biological concept that refers to the phenomenon where differences among similar species whose distributions overlap geographically are more pronounced than among those whose distributions do not overlap.
This concept is typically demonstrated within ecology and evolutionary biology.
Since the question seems to be misplaced and I do not have the specific information about the third criterion by Schluter & McPhail, 1992, I cannot provide an accurate answer to the question asked.