I have compiled a list of uses for a knife. Removing tags from clothing, opening packaging, opening an envelope, everything related to food, cutting string, cutting a shirt, cutting tape, cutting a seatbelt, cutting through material to bandage a wound, shanking a dude, a spoon/fork/knife, whittling something if you need to, making a fire if you need to, that fucking clamshell plastic packaging, you could heat it to cauterize a wound, and none of this takes into consideration 'what if your knife has other tools in it'. If it has a serrated edge, even more uses. You could cut zip ties, you could cut rope, you can use a knife as a screwdriver or wirecutters.