Question
(P → Q) ↔ P

Answer

Truth table:
Column $\rightarrow$ 1 2 3 4
Row $\downarrow$ P Q P $\rightarrow$ Q (P$\rightarrow$Q) $\leftrightarrow$P
1 T T T T
2 T F F F
3 F T T F
4 F F T F
  1, 2 ($\rightarrow$) 3, 1 ($\leftrightarrow$)
Explanation: (P → Q) ↔P In the fact sheet relating to this complex joint statement, column no. 1 and 2 are the first pillars, while the other two are the secondary pillars. Column no. 4 presents the whole complex joint disintegration. Column no. 4 The following facts come to light:
(1) According to the first row, if P is true and Q is true, then (P → Q) ↔P is the whole complex joint statement truth.
(2) According to the second row, if P is true and Q is false, then (P → Q) ↔P is the whole complex joint statement is false.
(3) According to the third row, if P is untrue and Q is true, then (P → Q) ↔P is the whole complex joint statement is untrue.
(4) According to the fourth row if P is untrue and Q is untrue, (P → Q) ↔P is the whole complex joint statement untrue.

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