necessary condition
sufficient condition
logical implication
conditional relation
implication
affirming the consequent
contraposition
importation
quadratic reciprocity
exportation
mathematical induction
antecedent
consequent
prime ring
contrastivism
Ford circle
law of excluded middle
predicate
categorical proposition
prime ideal
existential instantiation
Wall-Sun-Sun prime
conchoid
Liouville number
p-adic norm
contradiction in terms
contradiction
Iverson bracket
explanandum
term logic
explicandum
is-ought problem
limit point
circle of Apollonius
formalism
law
characteristic polynomial
material implication
zero-order logic
sentential logic
stationary distribution
p-adic absolute value
P-bar
dialectic
Abel polynomial
proposition
paradox
mean value theorem
clausification
truth value