Not at all. If someone says "I have two peer-reviewed manuscripts ready for publication: one proving fermat's last theorem in 10 lines and one proving that P=NP

Not at all. If someone says "I have two peer-reviewed manuscripts ready for publication: one proving fermat's last theorem in 10 lines and one proving that P=NP in 5 lines" then it is fine to say "You are lying". If the person is using non-standard definitions of "peer-reviewed" or "proving", then that is their decision one consequence of which is that they should expect to be called a liar. In any case "they do not want me to live" is clearly a lie -- or are you going to introduce me to some new bending of language under which "they do not want me to live" does not mean "they want me to die"? Perhaps it means "they do not want me to live in the way that I want to live"? If so, as I said above, a risk of using language in such an extremely non-standard fashion is clearly that people will entirely reasonably mistake your statements for lying. Any attempt you make to tell me to do more research into what people mean by their words is just devaluing language and damaging communication: there has to be some rough consensus on semantics! That's what a language is!