Exercise logic.propositional.consequence
Description
Prove that formula is a logical consequence of a set of formulas
![](http://ideas.cs.uu.nl/images/external.png)
(~p || q) /\ (~q || r) => p -> r
ready: no
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Environment
initial=TList [TCon logic1.implies [TVar "p",TVar "q"],TCon logic1.implies [TVar "q",TVar "r"]]
Path 1
path | [0, 0, 0, 3, 0, 0, 2, 0, 2, 0, 3, 0, 0, 0, 2, 0, 0, 3, 0, 0] |
steps | 20 |
major rules | 3 |
active labels | |
enter consequence,
initial,
conj-intro,
navigator.down,
navigator.down,
enter cnf,
check,
navigator.down,
navigator.right,
check,
enter eliminateimplequiv,
logic.propositional.defimpl,
exit eliminateimplequiv,
navigator.up,
check,
navigator.down,
check,
enter eliminateimplequiv,
logic.propositional.defimpl,
exit eliminateimplequiv