Chapter 1.5, Problem 43E

The arguments given in Exercises $43-50$, were written by Lewis Carroll and appeared in his 1896 book Symbolic Logic. For each argument, define the necessary symbols, rewrite the argument in symbolic form, and use a truth table to determine whether the argument is valid.

$\begin{array}{l}\text{1. All medicine is nasty.}\\ \text{2. Senna is a medicine.}\\ \text{Therefore, senna is nasty.}\end{array}$

NOTE: Senna is a laxative extracted from the dried leaves of cassia plants.