Thats kind of lawyer speak, not much different when insurance company don't wanna cover you because of some tiny font paragraph or different interpretation in the contract.
USA could before this war started (because they publicly on camera warned about invasion days before) tell Putin that in case of invasion they believe they cannot fullfill contract commitment so in this situation the contract would be void and they would have to return few old nukes to Ukraine. This would be enough deterrent and fair to justify.
There is no part of the agreement that US didn't uphold. That is not lawyer speak, that is reality. If you think I am wrong cite the part they are not upholding.
By the lawyer speak I mean for the same reason insurance put some misleading wording that other party don't understand so that you can interpret it differently. I think the intent should more important.
USA could before this war started (because they publicly on camera warned about invasion days before) tell Putin that in case of invasion they believe they cannot fullfill contract commitment so in this situation the contract would be void and they would have to return few old nukes to Ukraine. This would be enough deterrent and fair to justify.