The major corporate media outlets have sucessfully demonized "conspiracy theories." But investigators dont build their ideas out of thin air- pieces of good evidence are woven together to arrive at a certain conclusion. Legally, a conspiracy is when two or more people get together and plan to commit a crime, and then later do something (furtherance) to help cause their planned crime to happen. Any prosecutor will tell you that conspiracies are common, [that] they occur all the time. So to doubt a well-investigated claim of conspiracy means that you have to believe in the "extreme coincidence theory."