Take the following as truth: Aside from the occasional Ted Turner bombshell, the Gateses seem to have just about guaranteed themselves the top slot on The Slate 60 for the rest of their lives, even if they never give another nickel away.
Then the following statement: "The Gateses have never appeared on The Slate 60, probably because of the extreme philanthropist Ted Turner maintaining the top slot for decades." is true, false, or inconclusive?