First Doctrines of Logic
The First Doctrines of Logic were a set of principles pertaining to Vulcan logic.

After Spock's mind became disordered due to experiencing time as a fluid, he started maniaclly reciting the First Doctrines of Logic as he tried in vain to ground himself and interpret the experience using conventional logic. ()

Excerpts
"Constructionism combines the epistemological thesis about what can be known with a meta-philosophical view on the nature of philosophical questions."
"Formal logic utilizes plausible reasoning and inductive methods organized into subsystems."
"The most important of these systems is classical logic."
"Formal logic utilizes plausible..."
"But even if their premises are true..."
"All inductive arguments are therefore deductively invalid."
"The premises of an inductive argument do not entail the truth of the argument's conclusion."
"In deductive logic, the methods of reasoning and the procedure for finding evidence are investigated."
"Only if it is impossible for the conclusion to be false while the premises are all true."
"To say that a logical construction is valid is to say that the premises are true."
"A deductive argument is one that aims to show its conclusion must be true."
Philosophy
Vulcan literature