Informal Fallacy Vs Informal Argument

I think formal fallacy is easier to fix, In a formal fallacy, the argument itself is invalid, but in a informal fallacy, the argument is psychologically or emotionally persuasive but logically incorrect. Informal fallacy is harder to be identified and fixed because the argument is persuasive. For example,

Annie's mother: Didn't I say, "don't play with matches"?

Annie: I never play with matches. I was using them to burn down Ms. Zyra's plants.

This is an example of the fallacy of accent. It sounds like Annie was right, she did not play with matches, but if we check carefully, Annie changed the meaning of an argument by emphasizing the term play.