Martyrdom is the test of faith, but the test of truth is truth.

NEWYORKER: Moon Man

Justice Holmes famously said that the best test of truth is its ability to get itself accepted in the marketplace of ideas.

FORBES: The Thought Police

Then it was time for the Electric Kool-Aid X Server Test, the moment of truth.

CNN: The tale of the gratuitous GUI

"We are disappointed that at the turn of the century we are still having to test the situation to see what the truth is, " said USPCA director Stephen Philpott.

BBC: Plan to cull NI badgers

But it has been suggested that if Marcus Trescothick had been available for England in the last four years Cook would not have played a Test, and there might be some truth in that.

BBC: Jonathan Agnew column

But the truth is that in the Vietnam era patriotism was put to the test, and was genuine on both sides of the debate.

ECONOMIST: Old Glory��s strength