And that’s why the numbers in New York, for example, moved so much between 9 p.m. (when polls closed) and the end of the night. Lots of young people completed the exit poll, which made it look like Sanders was doing better than he did. That margin of error is why networks use exit polls in their decision to call a race — but don’t rely only on exit polls.

And that’s why Robbins’s tweet is bad. Or, really, that’s one reason his tweet is bad.

It’s also bad because thinking exit poll results trump actual voting results (“in reality, Bernie has won four more states”) is idiotic. And it’s bad because thinking that “the machines are rigged” in 19 states to Clinton’s advantage (including a variety of different types of “machines”) without anyone knowing suggests a conspiracy of truly impressive scale.