- X is more direct and outwardly focused
- X will look for fallacies and be quick to point them out
- Y will notice fallacies as well, but may be content to work with an imperfect system or theory
- X may be more directly skeptical and hesitant to work with a flawed system
- Y can half-accept a theory or system, making use of it while keeping in mind that the results may be inaccurate
- X can half-accept a theory or system as well, but may prefer to refrain from using it until sufficient evidence is found to support it or until it is improved
My theory is that both functions notice fallacies and can be skeptical, but they often express this in different ways that can best be explained through example.
"I'm rather skeptical about this whole thing. For one, there's (insert logical fallacy here). Furthermore, there doesn't seem to be any evidence supporting this theory. If I were you, I wouldn't rely on this."
"Here's the problem with this that I see: (insert logical fallacy here). Still, I suppose we could make use of it anyways as long as we keep in mind that it may not be accurate. It does seem like it could still be useful."