Ch. 25
That logic is necessary.
When one of the company said to him, "Convince me that logic is necessary," - Would
you have me, he said, demonstrate it to you? "Yes."
Then I must use a demonstrative form of argument.
"Granted." And how will you know, then, whether
I argue sophistically? On this, the man being silent,
You see, says he, that even by your own confession,
logic is necessary; since without it, you cannot even
learn whether it be necessary or not.
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