Logical Concepts
This handy tool allows us to understand oppositional inference
What is the Square of Opposition
Who goes there?
What is a Question (Non Logical Statement)
Mathematics is the bane of my life
All (M) is BL
No HP is a B
Some Horses are Neigh-Sayers (True)
No H are N is false, Some H are not N and All H are N are unknown.
A relationship between two statements that occurs when both statements express the same basic judgment
What is Agreement
"May You Live in Interesting Times"
What is a Command (Curse, Non-Logical Statement)
"Cleopatra's nose: if it had been shorter, the whole history of the world would have been changed."
All Cleopatra's Nose (CN) is World-History-Changing.
Some Facts are Stubborn Things (Obversion)
Some Facts are not non-stubborn Things
"No thrice-tracked trout is shimmying in the sallow shallows" (False)
Some T is S is true, All T is S and Some T are not S unknown
The type of opposition in which the two statements differ in quantity of the subject
What is Subalternation
Few gamblers are lucky ducks
What is a Particular Statement
"The slithy toves did gyre and gimble in the wabe"
All the ST are GGW
All Bearded Goats will be Severely Judged (Obversion)
"Some Poets are not Inspired" (False)
A complete list of all of the important aspects of what a thing is
What is a Comprehensive Description
Everyone Hates Me
What is a Universal Affirmative Statement
"The silken, sad, uncertain rustling of each purple curtain thrilled me."
No logic students are non-non-logical (Obverse)
All logic students are non-logical
"No one can simply enter Mordor" (true)
Some O can EM is false, the other statements are unknown.
To say that that which is is and that which is not is not is not
What is a True Judgment
"Somebody in this room needs a bath"
What is a Specific Statement
"Lord, what fools these mortals be!"
All M are F
All Toads in Spats Drive Recklessly Down the Cats (Conversion)
Some Things Which Drive Recklessly Down the Cats are Toads in Spats
All Dodos are extinct birds (True)
Some D are E is true, other statements are false