The "unambiguous evidence" included Pakistan's secret blueprint for a nuclear bomb.

Even so, the report said the agency had found no unambiguous evidence of an Iranian program for making nuclear weapons.

But no unambiguous evidence of a lunar meteor flash has ever been recorded.

Few specimens show direct, unambiguous evidence of having been hunted by humans.

These represent the earliest unambiguous evidence for modern human behaviour.

This specimen provided the first unambiguous evidence in some 75 years that the species was extant.

The image on the left shows what is considered some of the most unambiguous evidence.

Yet, so far, no unambiguous evidence has come to light demonstrating that Iraq possessed such prohibited weapons.

There is clear and unambiguous evidence that many children from migrant families are less educated than their peers.

We were surrounded by unambiguous evidence that there was intelligence in the universe far beyond ours.