tautology
I can tell you
synthetic
synthetical
truthmaker
affirmation
classical logic
truehood
factly
flatter oneself
assumption
connective
premise
premiss
certify
veracity
truth
true statement
to tell the truth
cross one's heart
truthen
proposition
avouchment
truth table
avowal
perfect pitch
fact
ex falso quod libet
trivialism
trueness
ternary logic
cataphasis
by God
truth value
put one's money where one's mouth is
if
claim
tell it like it is
valuation
universal quantifier
affirmative
possibly
theorem
evasion
know
truthness
contradiction in terms
aver
law
averment
vacuous truth
contradiction
equivocation
verify
declarative
apodeictic
neutrosophic
negation
argumentum ad consequentiam
maintain
trivialist
Alternativism
honest to goodness
factify
/gen
honest to God
postulate
veritas
stated
statement
valuation function
authenticate
positive statement
buy
provable
declared
verity
direct proof
God's truth
swear
argument
truthiness
vouch
conditional proof
noticeably
disjunct
warrant
tell the truth
tell you the truth
assert
inference
tenet
verisimilitude