premise: Michael Tunn (born 18 January 1974) is an Australian radio announcer and television presenter. He was hired by Australia's national youth station Triple J in 1990 at the age of 17, making him Australia's youngest professional radio presenter at the time.
hypothesis: Tunn died at the age of 18.
reason: There's not enough info to support the age of Tunn at his death, but nothing that contradicts it either.