You did make a claim.

Gravity existing and the earth going around the sun have been demonstrated beyond a reasonable doubt. Also it’s really easy to cite the evidence that supports those facts.

It was widely known information that cigarettes were good for you at one point so “widely known information” doesn’t mean much. That you even phrased it that was hints that you know the distinction between that and supported fact.

You don’t engage honestly in conversations.

Your failure to provide a reliable source for your claims is not my problem.

If you cannot provide a reliable source of your claims, your claim will be dismissed.