Examlex
determine whether the given argument is valid or invalid. If it is valid, derive the conclusion using our rules of inference and equivalence. If it is invalid, provide a counterexample.
-1. (?x)[Tx ? (?y)(Sy • Wxy)]
2. (?x)(Sx • Vx)
3. (?x)(Tx • Rx) / (?x)[(Rx • Vx) • (?y)Wxy]
Q8: Write down what you would like in
Q13: I ⊃ J<br>∼(J • I) / J
Q13: What elements of reflection are involved in
Q55: Which of the following propositions is
Q76: Working backward from the conclusion of this
Q81: Which of the following propositions is
Q97: Which of the following propositions is derivable
Q125: 1. J <span class="ql-formula" data-value="
Q182: 1. ∼(R <span class="ql-formula" data-value="
Q283: Which of the following propositions is derivable