roszczenie niepoparte dowodami

Michèle Roberts's unsubstantiated claim is another matter, but it might be worth taking as a hypothesis and looking into.

There were also unsubstantiated claim that Hill organized the union solely for his own economic benefit.

Otherwise the literature would simply be full of unsubstantiated claims which never get resolved.

The balloon industry has made unsubstantiated claims about the safety of balloons.

But the general code among lobbyists is that unsubstantiated claims are bad business.

See, I can make ad hominem and unsubstantiated claims too.

Can we have some better evidence for your unsubstantiated claim, please?

They must not be convinced by products sold on unsubstantiated claims.

There were unsubstantiated claims that he was a member of the Communist Party.

There were numerous unsubstantiated claims that the family was of Jewish origin.