[RightWhale]

You must be talking about something other than cold fusion.

A flash in the pan; fool's gold; when we got to Jerusalem, we discovered it wasn't there. My own cold fusion setup sits unused since its first violent moments of sizzling life, waiting for further instructions and a fresh supply of Canadian nickels.

[Diogenesis]

Some went to Jerusalem and found it was there, after all.
[Perhaps the nickels had too much copper.]