> Edit: I guess this phrasing (for each conspiracy) actually would be satisfied by the existence of any classified information about each topic, even classified

> Edit: I guess this phrasing (for each conspiracy) actually would be satisfied by the existence of any classified information about each topic, even classified information that wouldn't materially change the public's impression of the event. It's almost certainly true that "the government is concealing what they know about" the 9/11 attacks and the JFK assassination, for example, because there are some files and documents related to those matters that the government won't release publicly, which isn't the same as saying that those files and documents would change anyone's assessment of who is responsible for those events. That's my problem with the way the Chapman survey was worded. The prompt was overly broad. Answering "yes" for some of those "conspiracies" is reasonable, not an indication of conspiratorial thinking. It does, however, provide an upper bound for such thinking since a person who believes in conspiracies about those things (or are just general "black helicopter" types) are not going to answer in the negative (unless they think the poll is part of a secret government plot to out them...).