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![判断下列子句集中哪些是不可满足的: (1)S={~P∨Q,~Q,P,~P} (2)S={P∨Q,~P∨Q,P∨~Q,~P∨~Q}](https://img2.soutiyun.com/shangxueba/askcard/2023-10/3/1093/20231003125735977.jpg)
判断下列子句集中哪些是不可满足的: (1)S={~P∨Q,~Q,P,~P} (2)S={P∨Q,~P∨Q,P∨~Q,~P∨~Q}
判断下列子句集中哪些是不可满足的: (1)S={~P∨Q,~Q,P,~P} (2)S={P∨Q,~P∨Q,P∨~Q,~P∨~Q} (3)S={P(y)∨Q(y),~P(f(x))∨R(a)} (4)S={~P(x)∨Q(x),~P(y)∨R(y),P(a),S(a),~S(z)∨~R(z)} (5)S={~P(x)∨~Q(y)∨~L(x,y),P(a),~R(z)∨L(a,z),R(b),Q(b)} (6)S={~P(x)∨Q(f(x),a),~P(h(y))∨Q(f(h(y)),a)∨~P(x)} (7)S={P(x)∨Q(z)∨R(x),~P(y)∨R(y),~Q(a),~R(b)} (8)S={P(x)∨Q(z),~Q(y)∨R(y),~P(z)∨Q(z),~R(u)}