What I have said often does not apply to formal logic, where there may be only one correct way to tackle a question and one correct answer. Don't overload your writing with technical terms. Use them only when they express a point more shortly and neatly than ordinary English can. But there are a few points we are fussy about, which I now note. Propositions, beliefs, etc. are true or false.
Arguments are valid or invalid.
Do not talk of a valid proposition. To infer is to draw a conclusion, not to suggest one. Process and achievement words. My last point about words is perhaps much more subtle and more important than the others. Stop and think before reading on.