@EricPreneta I've read through this question a couple times and I may not be right in my response but I'm gonna give it a go. In the context of assumptions, they innately either have to be true or false, but it is up to us to judge how likely either of those cases are (essentially how reasonable the assumption is). To your point about premises, they are "subjective" in the sense that their truth relies upon the reasonability of the assumptions made to present the premise of the argument. I'm not sure if there is specific language that would dictate truthfulness, but I can give the example of something I was told about multiple choice questions as a young sciences student. Generally statements that give absolutes like "All, Any, None, etc." on the multiple choice are more likely to be false because of the magnitude of the claim that they are making. In that sense, you could look for language like that to say: "the claim that ALL... is less likely to be reasonable because of the magnitude of it". Hope this helps in some way, and if I'm way off the mark I hope somebody can correct me. Best, Ryan