BUDAPEST — As Yogi Berra once famously said, it ain’t over til it’s over, and while the swimming part of these 19th FINA championships is just now half over, and for a great chunk of the world these championships perhaps have an are-they-really-happening vibe, up close there are threads that clearly deserve pulling:

— Caeleb Dressel, the top American guy, went home abruptly. USA Swimming wouldn’t say what’s wrong, citing medical privacy laws.

Let’s deconstruct.