[…] Christina Warren, or Xtina […]

Falling roof, hidden shafts, slithiest snakes could not have stopped me after that. I arrived in the sparkling area.

The atmosphere is made up of a number of different gases.

5.7.T ( Unification theorem ) For any two terms or formulas without quantifiers X and Y, the following holds. (i) The unification algorithm UNIF₁, applied to X, Y, terminates after a finite number of steps. (ii) {X, Y} is unifiable iff UNIF₁ so indicates upon ter- mination. Moreover, the substitution σ then available as out- put is a most general unifier of {X, Y}.