No one reported you claimed those things and particularly not in an official meeting where there should have been minutes and would have been witnesses which could have boosted a lack of recollection to certainty.
Your examples also fail to continue with "but if I did it was a joke" -- a remark itself almost as damning as the act. We're not talking about mere defamation in the case of Assange: talking about the secretary of state-- who unambiguously has the power to murder foreign persons with a suggestion-- suggesting that she's would joke about murdering people. Not a great look.
So, no, your remarks are unambiguously not denials, but no denial was required in your case.
I don't recall calling for or making detailed plans to assassinate the leaders of the G7 at their recent summit.
I also don't recall claiming that you were a pedophile, a murderer and a cross-dresser.
So does that mean you believe I have actually said/done the above, as I haven't denied them?