assertion, averment, asseveration

a declaration that is made emphatically (as if no supporting evidence were necessary)

• claim — an assertion of a right (as to money or property)
• claim — an assertion that something is true or factual
• accusation, charge — an assertion that someone is guilty of a fault or offence
• contention — a point asserted as part of an argument
• ipse dixit, ipsedixitism — an unsupported dogmatic assertion
• avowal, avouchment, affirmation — a statement asserting the existence or the truth of something
• testimony — an assertion offering firsthand authentication of a fact
• denial — the act of asserting that something alleged is not true

• declaration — a statement that is emphatic and explicit (spoken or written)