Authors: Danielle Collins and Aaron Brown

There are four categories of informal logical fallacies, with each category containing a subgroup of logical fallacies that rely on a similar logical structure to convey unsound conclusions. These materials explore the fallacies of presumption, relevance, weak induction, and ambiguity.

These materials are part of a collection presented at LESA’s Family Law Conference (Kananaskis) program in Kananaskis on October 24–25, 2025.