What is irrelivant reason called?

An irrelevant reason is often referred to as a "red herring." This term describes a logical fallacy where a distraction is introduced to divert attention from the main issue or argument. It can also be called a "non sequitur," which refers to a conclusion or statement that does not logically follow from the previous argument or context. These tactics can undermine rational discourse by shifting focus away from pertinent facts or arguments.