baseless claims
"I won the election" when you lost the election, to pick one example.
Mr. Trump and his allies intensified their baseless claims that fraud had wrongly tilted the election in Mr. Biden’s favor, filing a new lawsuit challenging the results in select counties where Mr. Biden won in Pennsylvania.
Baseless Claim
A baseless claim is a claim that has no base, and is typically a common counter-argument in online debates.
A baseless claim is Andrew Tate saying that women are statistically more susceptible to falling for men with a small dick instead of men with a large one