Six is larger than seven.
Six, seven and eight are real numbers. If a real number equals another real number adding one, the first number is larger. If the number x is larger than number y, then y is not larger than x. Seven equals six plus one. Eight equals seven plus one. Two is positive. If a number is positive, then the double of it is also positive. Eight is the double of four. Four is the double of two.
RealNum(six) ∧ RealNum(seven) ∧ RealNum(eight) ∀x ∀y (RealNum(x) ∧ RealNum(y) ∧ EqualAddOne(x, y) → Larger(x, y)) ∀x ∀y (Larger(x, y) ↔ ¬Larger(y, x)) EqualAddOne(seven, six) EqualAddOne(eight, seven) Positive(two) ∀x ∀y ((Positive(x) ∧ EqualDouble(y, x)) → Positive(y)) EqualDouble(eight, four) EqualDouble(four, two)