(13) Illustrate contradictory and opposite terms.
(14) Show that words with negative prefixes are not necessarily the contradictory of the corresponding affirmative forms.
(15) State and explain the law of excluded middle.
(16) Symbolize the law of excluded middle.
(17) State the law of sufficient reason. Illustrate.
(18) Illustrate the unity of the three primary laws of thought.
=11. QUESTIONS FOR ORIGINAL THOUGHT AND INVESTIGATION.=
(1) Prove that the judgment is the elemental form of evolved thought.
(3) Show that “Whatever is, is” is a statement of complete absolute identity only.
(5) By means of _one_ proposition state relative identity.
(6) Show that incomplete absolute identity is a term more or less illogical.
(7) Show that these statements are exact expressions of relative identity: All men are some wise. Some men are some wise.
(8) Why is the law of contradiction so named?
(9) Show that space may be bisected by drawing a circle upon the black board.
(10) Show that there is a difference in meaning between “You are not honest” and “You are not-honest.”
(11) Is there any difference in meaning between disagreeable and not agreeable?
(12) Which is the stronger term not-just or unjust? Why?
(13) Give a list of words in which the contradictory forms are expressed by the ordinary prefixes.
(14) Illustrate by circles the law of excluded middle.
(15) Illustrate by a line-diagram the difference between contradictory and opposite terms.
(16) Show that the province of the law of sufficient reason is physical science.
=1. LOGICAL THOUGHT AND LANGUAGE INSEPARABLE.=
Any impression upon the mind tends to manifest itself in some form of expression. Impression which arouses thought tends to expression in the form of symbols. Thought and symbol go hand in hand. Expression, taking the form of word-symbols, constitutes a word-language.
It is commonly supposed that language is serviceable mainly in communicating one’s thoughts to others, but language does service in another way which is quite as important. It tends to clarify and make definite all thought. Without a word-language thinking would lack continuity; would be vague, loose, illogical. The right use of a word-language, therefore, is a necessary adjunct to logical thought. The basic element of a word-language is the logical term.