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the phenomena more closely we shall find that not a single element of moral conduct is unrepresented in reasoning.
At the sametime, the special case naturally has it peculiarities.

Thus, we have a general ideal of sound logic.
But we should not naturally describe it as our nature of the kind of reasoning that befits men in our situation.
How should we describes it?
How if we were to say that sound reasoning is such reasoning that in every conceivable state of the universe in which the facts stated in the premisses are true, the fact stated in the conclusion will thereby and therein be true.
The objection to this statement is that it only covers necessary reasoning, including reasoning about chances.
There is other reasoning which is defensible as probable, in the sense that while the conclusion maybe more or less erroneous, yet the same pro-