Lots of studying. No single telltale demonstrates it. But taken together, the subtle clues paint one picture, and one picture only. Most of these people replying to me like "you moron it's fertilizer, not nuclear you imbecile, where's the flash / fallout / EMP / whatever." know only what they've "learned" from the nuke tests from the 1950s.

Nukes are vastly different than they were back then. They can almost pass for a conventional explosion, especially when disguised by smoke from pre-existing fires.

But no, I'm not going to give you a bunch of separate points for us to argue endlessly over, and allow trolls to derail the discussion and ensure it all amounts to nothing. Thanks, but nope.

These guys think I'm the one who's deluded into seeing nukes where they aren't. But such is not the case, it is the contrary: they have been trained to think that nukes are megaton explosions only, with all the 1950s pyrotechnics, SPECIFICALLY so that they won't recognize modern nukes. But I'm here and I'm educating as best I can.