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IT 422: Intelligence Systems. FOL Extra. At least two students love AI Ǝ x,y ┐(x=y) Student(x) Loves(x,AI) Student(y) Loves(y,AI) or ∃x∃y (Student(x) Loves(x,AI ) ∧ Student(y) Loves(y,AI) ∧ x ≠ y. Richard has exactly two brothers, John and Geoffrey
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IT 422: Intelligence Systems FOL Extra
At least two students love AI Ǝ x,y ┐(x=y) Student(x) Loves(x,AI) Student(y) Loves(y,AI) or ∃x∃y (Student(x) Loves(x,AI )∧ Student(y) Loves(y,AI) ∧ x ≠ y
Richard has exactly two brothers, John and Geoffrey Brother (John,Richard ) ∧ Brother (Geoffrey,Richard) ∧ John ≠Geoffrey ∧ ∀x Brother (x,Richard ) ⇒ (x=John ∨ x=Geoffrey)