Today that myth has been debunked by historians for many decades. Rumors that Balbo was assassinated on Mussolini's orders have been conclusively debunked. The claims in the letter were debunked and were flagged as conspiracy theories. Biographer Kenneth Ackerman says that Summers' accusations have been "widely debunked by historians". This theory was debunked by numerous experts. This claim has been thoroughly debunked by baseball historians. These notions have since been debunked by historians. This false claim has been debunked by medical experts. It was debunked by Snopes.com soon afterwards. However, these claims have been debunked. His September 23rd theories were also debunked by "Time" writer Jeff Kluger. Phrenology's practice was debunked scientifically by Pierre Flourens in the 19th century. These rumors were later debunked by Maida. His hypothesis about the creation of AIDS would ultimately be entirely debunked. McConnell's claims were definitively debunked in 2007.