Both Uses of

irrelevant
in
Fast Food Nation

And the defendant's intentions are irrelevant — a British libel case can be lost because of a truly innocent mistake.†
p. 245.9 *

irrelevant = not relevant (not related to the subject being considered, or not important enough to want to consider)

I hope that ten years from now this book really is irrelevant — and that the world it describes, so full of greed and lacking in compassion, is just a bad memory.†
p. 276.9