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 /\ r) => (p /\ q /\ p /\ r) || ((~p || ~q) /\ (~p || ~r))
ready: no
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Environment
initial=TList [TCon logic1.or [TCon logic1.not [TVar "p"],TCon logic1.and [TVar "q",TVar "r"]]]
Path 1
path | [0, 0, 4, 0, 0, 3, 0, 0, 0, 0, 2, 0, 2, 0, 4, 3, 0, 0, 2, 0, 0, 4, 3] |
steps | 23 |
major rules | 2 |
active labels | |
enter consequence,
initial,
navigator.down,
navigator.down,
enter cnf,
exit cnf,
navigator.up,
navigator.up,
navigator.downlast,
enter cnf,
check,
navigator.down,
navigator.right,
check,
enter demorgan,
logic.propositional.demorganand,
exit demorgan,
navigator.up,
check,
navigator.down,
check,
enter demorgan,
logic.propositional.demorganand