A Reuters article about the Higgs boson provides a lovely mixed metaphor from Oliver Buchmueller, one of the CERN researchers:
If I were a betting man, I would bet that it is the Higgs. But we can't say that definitely yet. It is very much a smoking duck that walks and quacks like the Higgs. But we now have to open it up and look inside before we can say that it is indeed the Higgs.