The quoted line from Sacks – “Is Texas going to secede from the Union? Said, all right, what’s going to happen?” – is framed explicitly as a question, not as a declaration that Texas will secede by any particular date. It lacks:

• a clear directional claim (he does not say Texas will or won’t secede), and
• any time horizon (no "by year X" or similar),

so it doesn’t meet a basic standard for a falsifiable prediction.

Independently of that, Texas has not seceded from the United States as of November 30, 2025 (it remains a U.S. state under federal law and in all official records), so if one tried to reinterpret this as a concrete forecast that Texas would have seceded by now, that forecast would be wrong. But because the original statement is merely a rhetorical / speculative question, not a definite forecast, the appropriate status for this item is that it’s not a well-formed prediction, hence ambiguous for verification purposes.