Editing Loglan (section)

=== Conjunctions ===
Loglan has several sets of conjunctions to express the fourteen possible [[logical connectives]]. One set is used to combine predicate expressions ("e" = [[Logical conjunction|and]], "a" = [[Logical disjunction|inclusive or]], "o" = if and only if), and another set is used to combine predicates to make more complex predicates ("ce", "ca", "co"). The sentence "La Kim matma e sadji" means "Kim is a mother and is wise", while "La Kim matma ce sadji vedma" means "Kim is a motherly and wise seller", or "Kim sells in a motherly and wise manner". In the latter sentence, "ce" is used to combine matma and sadji into one predicate which modifies vedma. The sentence "La Kim matma e sadji vedma", using "e" rather than "ce", would mean "Kim is a mother and wisely sells."

Other logical connectives are based on the elementary connectives "e", "a" and "o", along with the negation word "no". For example, [[material conditional|logical implication]] is indicated by the word "noa". The word is chosen to make it easy for a Loglan speaker to see that "A noa B" is [[logically equivalent]] to "no A a B". Brown argues that it is thus easier in Loglan than in English to see that two sentences like these are different ways of saying the same thing:
* "La Kim ga sadji noa fa vedma da."  = If Kim is wise, she will sell it.
* "La Kim ga no sadji a fa vedma da."  = Kim is not wise, and/or she will sell it.

The conjunction "a" expresses the [[inclusive-or]] relation; that is, one of the two alternatives is true, or possibly both. The [[exclusive-or]] relation, in which only one of the alternatives is true, but not both, is expressed by a different word, "onoi". Again, the word is chosen to make clear the logical equivalence of "A o no B" and "A onoi B":
* "Tu fa titci o no tu fa morce."  = You will eat if and only if you do not die.
* "Tu fa titci onoi tu fa morce."  = You will eat, or you will die.

A special conjunction "ze" is used to create a "mixed" predicate which may be true even if it is not necessarily true for either of the component predicates. For example, "Le negda ga nigro ze blabi" means "The egg is black-and-white". This would be true if the egg were striped or speckled; in that case it would not be true that the egg is black nor that it is white. On the other hand, "Le negda ga nigro e blabi" would make the claim that "The egg is black and (it is also) white".