If you cannot, why are you recommending that people use that as their justification, knowing it is illegal. If anyone were to follow your advice, while you are knowingly lying to them about it, they could end up in jail as a result. And what you wrote underneath this quote is about what's allowed when you are actually attacked by an animal, not the preparation for said attack, so it's irrelevant. The edge doesn't matter since as he said it's mostly a stabbing weapon. And I've got knives from 15 years ago that still have their edge, it's fine as long as you aren't using it for other things (and the knives that I do use for other things like cutting rope/whittling/etc. you should be sharpening for that purpose, so your point would still be irrelevant. Correction: You relayed information you do not believe is true about how some places let you carry some objects for animal defense. And you did not say some places, you said you can go down that route, as a blanket statement. It also is not bemusing when you are making up the rules.