Question: The Jonestown conspiracy theories are often believed by proponents to be a covert example of a program of experiments on human subjects that was at times what?
Sentence (from "Bullspotting"): Several of the conspiracy theories mentioned originate from the 9/11 Truth movement, whose proponents believe that the terrorist attacks on the 11th of September 2001 were an inside job executed by the American government, and from young-earth creationists, whose proponents hold that scientists are hiding information which would disprove evolution.
Relevant evidence: No