I think you are either earth or water.......Initially, that is what I thought anyway..I sorta pick up Pisces...but, that could be a moon or rising sign..
Oh, the eliminating process.....ah..I see..
Well, that is somewhat complex and not always easy to explain..Sometimes it is just an energy I get from people...
... right, right ... gotchu, you successfully eliminated the correct element, and when you can eliminate 2 or more, it becomes very easy to guess a person's sign within 3 tries.
There were times I hit it, on the first try, and really shocked folk to death, nearly, lol.
You are good and knowledgeable about this, for sure I'm Becoming Me.
Though we haven't shared much, in terms of dialog, I did hint to use all resources A person's profile page speaks volumes to their astrological profile, in most instances ... Some folk will even show their Birthdays