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9 Cards in this Set

  • Front
  • Back
When are two statements contrary?
Two statements are contrary if and only if they can both be false but cannot both be true.
When are two statements subcontraries?
Two statements are subcontraries if and only if both can be true but both cannot be false.
Tell me about the relationship of subimplication.
Subimplication is the relationship between a universal and particular statement of the same quality, in which the truth of the universal necessitates the truth of the particular.
Tell me about the relationship of subimplication in the square of opposition.
Subimplication is the relationship from A to I statements, and E to O statements.
Tell me about the relationship of contrariety in the square of opposition.
A and E statements have a relationship of contrariety.
Tell me about the relationship of subcontrariety in the square of opposition.
I statements are subcontrary to O statements, and O statements are subcontrary to I statements.
Tell me about the relationship of subimplication in the square of opposition.
Subimplication is the relationship from A to I statements and E to O statements.
Tell me about the relationship of superimplication.
Sumperimplication is the relationship between a universal and particular statement of the same quality, in which the falsity of the particular necessitates the falsity of the universal. Superimplication is the implication of falsity.
Tell me about the relationship of superimplication in the square of opposition.
A relationship of superimplication exists from I to A statements, and from O to E statements.