[xXOpkillerXx]

Arch idk if you realize this but you're basically asking for a solution to the unsolved problem that is pragmatics analysis in natural language processing. If we could prove the intent of someone by simply analysing the language (syntax, vocabulary, etc) we'd revolutionize that whole field. So yeah, you use context to infer intentions that hopefully the receiver will understand, and if they dont believe your intentions after you explicitely mentionned them, then something else needs to happen (stop the discussion, try to convince, rephrase your message, etc).