Edits

Advanced/Definable Sets/parts/0 logic.tex

@@ -73,13 +73,23 @@ Evaluate the following.
 \begin{itemize}
 	\item $(T \land F) \lor T$
 	\item $(\lnot (F \lor \lnot T) ) \rightarrow T$
-	\item $A \rightarrow T$ for any $A$
-	\item $(\lnot (A \rightarrow B)) \rightarrow A$ for any $A,B$
+	\item $(F \rightarrow T) \rightarrow (\lnot F \lor \lnot T)$
 \end{itemize}
 
 \vfill
 \pagebreak
 
+
+\problem{}
+Evaluate the following.
+\begin{itemize}
+	\item $A \rightarrow T$ for any $A$
+	\item $(\lnot (A \rightarrow B)) \rightarrow A$ for any $A, B$
+	\item $(A \rightarrow B) \rightarrow (\lnot B \rightarrow \lnot A)$ for any $A, B$
+\end{itemize}
+
+\vfill
+
 \problem{}
 Show that $\lnot (A \rightarrow \lnot B)$ is equivalent to $A \land B$. \par
 \hint{Use a truth table}