Conversation so far:
How does John Edward back up his psychic abilities?
Critics of John Edward assert that he performs the mentalist techniques of hot reading and cold reading.
What is involved in a hot reading?
In hot reading, the reader uses information about the person receiving the reading (for example, from background research) which the receiver is not aware that the reader already knows.
What other techniques does John Edward use besides hot reading?
John Edwards performs mentalist techniques of cold reading as well
Does John Edward's communication with audience members' deceased friends and relatives prove to be successful?
Illusionist and skeptic James Randi found that just three of 23 statements made by Edward were confirmed as correct by the audience member being read

Question: How many were incorrect?
Self-contained rewrite: How many of John Edward's guesses are incorrect?