Points needed for next level: 818 Level
You should avoid claiming that something is impossible in my presence – I get irritated and I might take it as a challenge. You should avoid claiming it altogether. There almost certainly are impossible things, but do you really think you know what’s impossible? Just don’t state that something is impossible, as if that’s fact. Express room for doubt, especially when you’re talking about science, say “probably impossible” or “most likely impossible” and we should be fine. Many things that were once considered impossible are now shown to be possible, and I myself enjoy taking on “impossible” goals, and showing how possible it is to accomplish them. But I still get pissed when “impossible” is stated like fact.