Jesus, you don't even know what that is.
Jeremy.
Any body claiming empirical evidence for something that is indistinguishable from the Emperor's new clothes, in your case
Zero Zebras.....who then claims that evidence is so incontrovertible so as to merit shutting down any contrary view must indeed be making the Mother of Courtier's replies.
In terms of a universe which will expand forever, I'm not sure that will ever finally give empirical proof of an infinity and apparently we may never be able to observe but a section of the universe.
The evidence imv for an actual empirical observed infinity is not at hand.
Secondly infinities or the lack of them are not relevant to all arguments from contingency.