"Two things equal to a third demand an affirmative judgment or decision.

"In the opposite case the negative deduction is enjoined.

"It is by deductions from the most ordinary facts that one succeeds in
making common sense intervene automatically in all our judgments.

"What would be thought of one who, finding himself in a forest at the
time of a violent storm, would reason as follows:

"First: The high summits attract lightning.

"Secondly: Here is a giant tree.

"Thirdly: I'm going to take refuge there.

"Then it is that common sense demands that the state his three
propositions as follows:

"First: High summits attract lightning.

"Secondly: Here is a giant tree.

"Thirdly: I'm going to avoid its proximity because it will surely be
dangerous.

"If he acted otherwise; if, in spite of his knowledge of the danger, he
took shelter under the branches of the gigantic tree, exposing himself to
be struck by lightning, one could, in this case, only reproach him with