Question
~ (p $\leftrightarrow$ ~ ~ p)
| 1 | 2 | 3 | 4 | 5 | |
| p | ~ p | ~ ~ p | p $\leftrightarrow$ ~ ~ | ~ (p $\leftrightarrow$ ~ ~ p) | |
| 1 | T | F | T | T | F |
| 2 | F | T | F | T | F |
| 1(~) | 2 (~) | 1, 3 ($\leftrightarrow$) | 4 (~) | ||
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| $(R\ \rightarrow\ S)\ \&\ (A\ v\ C)$ |
| $B\ \&\ (P\ \rightarrow\ W)$ |
| $(W\ \rightarrow\ T)\ \&\ (S\ \rightarrow\ Y)$ |
| $P\ v\ R$ |
| $T\ v\ Y$ |
| $E\ v\ (E\ \&\ Q)$ |
| $E \rightarrow L$ |
| $\sim L$ |
| $Q\ v\ M$ |
| $M \rightarrow N$ |
| $N \rightarrow O$ |
| $(M \rightarrow O) \rightarrow (N \rightarrow P)$ |
| $(N \rightarrow P) \rightarrow Q$ |
| $(Q\ v\ Z)\ \&\ Q$ |
| $(P\ \&\ Q) \rightarrow R$ |
| $R \rightarrow (H \rightarrow G)$ |
| $H\ \&\ K$ |
| $P\ \&\ Q$ |
| $\therefore (G\ v\ I)\ \&\ H$ |