The eternal mercy and everlasting mercy The praphot, as it is called, is the eternal mercy. This means that no matter how praphot the praphot that bring in connection praphot. Contains the value true, the value is whatever the last truth comes out, it will always be a real like. If the given praphot is p ∧ q is true is true when both p and q are praphot the value true. Does not contain the value true is true in all cases, so this is the eternal mercy praphot? This time, see how to verify the eternal mercy. Check the eternal mercy by truth tables. This method is the most straightforward, that is, writing, if possible, of all praphot, come and see what the real truth is that all? If there is a number of praphot or praphot, there are 2 more praphot than 2 join the truth-table method is a very long time. So it is not as popular in actual usage, particularly in the examination room.The eternal mercy by checking assumed to be false. Principles assumed to be false, is to find out whether it is going to be anything that is false, praphot. If there is even a case of a single truth is false. No mercy is eternal. When it is assumed to be false, then the conflict occurred. This means that praphot is the eternal mercy. Quiz1. you shall check whether ~ ~ q-> {(p-> q) ^ p} is the eternal mercy?2. you shall verify that (~ ~ p-> q)--> (p-> q) is the eternal mercy?3. you shall verify that [((p-> q) ^ (p v r)) ^ ~ r]-> q.4. you shall verify (a p-> ~ q) v (q-> ~ p) is the eternal mercy?
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