YourLogicalFallacyIs.com defines the Ambiguity fallacy as follows:
You used a double meaning or ambiguity of language to mislead or misrepresent the truth.
Politicians are often guilty of using ambiguity to mislead and will later point to how they were technically not outright lying if they come under scrutiny. The reason that it qualifies as a fallacy is that it is intrinsically misleading.
Example: When the judge asked the defendant why he hadn't paid his parking fines, he said that he shouldn't have to pay them because the sign said 'Fine for parking here' and so he naturally presumed that it would be fine to park there.
"Coach Dave," pictured above, has used this fallacy to say that discrimination is good and healthy. He defines it as:
recognition and understanding of the difference between one thing and another.
This is a definition of discriminate. We do in fact discriminate things on the daily basis in the context of being able to tell that one thing is different from another. That is not what Coach Dave is concerned with though. He's taking this definition out of context and applying to the transgender bathroom situation and saying that it's good to discriminate. The context that he wants to use the word in requires this definition:
the unjust or prejudicial treatment of different categories of people or things, especially on the grounds of race, age, or sex.
You cannot use the colloquial sense of the word, which would be the first definition presented here.
To hear more of my response please watch: