Subcontraries in Traditional Logic
Subcontraries are two particular statements in traditional logic that cannot both be…
Subaltern in Syllogistic Logic
In syllogistic logic, a subaltern relationship means a universal proposition's truth implies…
O-Proposition in Traditional Logic
An O-proposition, in traditional logic, is a particular negative categorical proposition. It…
Obverse in Traditional Logic
The obverse is a logical operation that negates a proposition's predicate and…
I-proposition in Traditional Logic
An I-proposition, in traditional logic, is a particular affirmative categorical statement. It…
Existential Import in Logic
Existential import refers to the assumption that a statement implies the existence…
E-proposition: Understanding Universal Negatives in Logic
An E-proposition, in traditional logic, is a universal negative categorical statement. It…