Show by means of an explanation in words that the sentence q ( p q ) is a tauto the method of conditional proof can be applied in a nested way in showing that a given senten fology. (the next example illustrates this.) when this is done, it to write each assumption by itself, to make it stand out, and it to label each assumption, to make it easy to refer bac may use labels such as a1, a2, a3, and so on to label the successive assumptions. also, to keej he nesting of assumptions, it to indent a bit more each time we introduce a new assumptic nindent each time we discharge an assumption. (we have used this format in the solution of tł male )