I have not yet found evidence to support his assertion.

But they have yet to present the evidence to support their assertions.

Even if the president does have the power, they say, he should be required to support his assertions with evidence.

However, he said, there are a few factors that support your friend's assertion.

The admiral did not provide any evidence to support his assertion.

What objective evidence does he have to support his assertions?

There is no evidence to support his assertions in this regard.

But the epidemiologic evidence simply does not support his assertion.

But she declined to offer examples or provide any specific information to support her assertions.

But when asked for any evidence to support his assertion, the Mayor's press office did not provide any.