He'd know that if he had any actual useful background on the subject.
https://www.thenation.com/article/reminder-exit-poll-conspiracy-theories-are-totally-baseless/
Here’s how exit polling works: In most states, Edison conducts phone interviews before Election Day to capture absentee and early voting. Then, on Election Day, they send staff to between 15 and 50 polling places per state, and they ask between 500 and 3,000 voters to fill out questionnaires indicating which candidate they voted for and what issues are important to them. In order to account for those voters who refuse to fill out a questionnaire, exit pollsters have to adjust their survey data. Lenski says that about 50–60 percent refuse to participate. When someone says no, the pollster notes the person’s rough age, race, and gender. They then weight their data to match the population that voted at that location.
Some media outlets post preliminary data when the polls close—that’s the supposedly raw data that, according to the conspiracy-minded, reveal the fraud. But those data have already been merged with the results of those telephone interviews, and they have already been adjusted throughout the day (the interviewers send in their survey results in three waves). Unadjusted data are never released. (If you Google “exit polls adjusted New York,” you’ll get back dozens of posts claiming that the “unadjusted exit polls” varied significantly from the final results. All of those posts are dead wrong, as none of their authors have any idea what the unadjusted data looked like.)
https://fivethirtyeight.com/features/ten-reasons-why-you-should-ignore-exit/
1. Exit polls have a much larger intrinsic margin for error than regular polls. This is because of what are known as cluster sampling techniques. Exit polls are not conducted at all precincts, but only at some fraction thereof. Although these precincts are selected at random and are supposed to be reflective of their states as a whole, this introduces another opportunity for error to occur (say, for instance, that a particular precinct has been canvassed especially heavily by one of the campaigns). This makes the margins for error somewhere between 50-90% higher than they would be for comparable telephone surveys.
2. Exit polls have consistently overstated the Democratic share of the vote. Many of you will recall this happening in 2004, when leaked exit polls suggested that John Kerry would have a much better day than he actually had. But this phenomenon was hardly unique to 2004. In 2000, for instance, exit polls had Al Gore winning states like Alabama and Georgia (!). If you go back and watch The War Room, you’ll find George Stephanopolous and James Carville gloating over exit polls showing Bill Clinton winning states like Indiana and Texas, which of course he did not win.
= new reply since forum marked as read
