Well, technically, ja, most can. But most hacksaws, for example, are terrible at the job. Oh, you can cut an arm off, alright, if you're willing to hang around for quite a while and put a lot of effort into the task! The teeth clog up too easily and it doesn't cut evenly.

No, no, a proper bonesaw is best. Unless you want me to tear this arm off with brute force!

[He is. Way too jazzed about this.]