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Pravdivostne funkcie akehokolvek poctu elementarnych viet sa daju napisat v scheme takehoto druhu:
| (T T T T)(p, q) | Tautology (if p then p, and if q then q)[p implikacia p . q implikacia q] |
| (F T T T)(p, q) | in words: Not both p and q. [~(p . q)] |
| (T F T T)(p, q) | '' '' If q then p. [qimplikaciap] | | (T T F T)(p, q) | '' '' If p then q. [pimplikaciaq] |
| (T T T F)(p, q) | '' '' p or q. [p v q] | | (F F T T )(p, q) | '' '' Not q. [~q] | | (F T F T)(p, q) | '' '' Not p. [~p] | | (F T T F)(p,q) | '' '' p or q, but not both. [p . ~q :v: q . ~p] | | (T F F T)(p, q) | '' '' If p, then q; and if q, then p. [p totoznost q] |
| (T F T F)(p, q) | '' '' p | | (T T F F)(p, q) | '' '' q | | (F F F T)(p, q) | '' '' Neither p nor q. [p . ~q or p | q] | | (F F T F)(p, q) | '' '' p and not q. [p . ~q] | | (F T F F)(p, q) | '' '' q and not p. [q . ~p] | | (T F F F)(p, q) | '' '' p and q. [p . q] | | (F F F F)(p, q) | Contradiction (p and not p; and q and not q.) [p . ~p . q . ~q] |
Tie pravdivostne moznosti pravdivostnych argumentov, ktore vetu robi pravdivou, budem nazyvat jej pravdivostnymi dovodmi.
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