They provided Newsnight with cogent evidence of this.
From the guardian.co.uk
These photostats were in themselves cogent evidence, but in matters like this the mind must shut itself against the will to believe.
From the theatlantic.com
Growing out of the mosaic and fresco traditions, these images accompanied Byzantine expansion into Serbia, Russia and the Middle East, providing effective and cogent evidence for conversion.
From the washingtontimes.com
Why would you expect him to be cogent on any other matter, or ask him for evidence?
From the economist.com
Mr Bolton provided excellent evidence of Senators having serious reservations and stated cogent reasons.
From the washingtontimes.com
That is the gist of the argument in this article and backed up by the archaeological evidence it looks pretty cogent, certainly worth more of an report on WP.
From the en.wikipedia.org
The evidence was credible, inherently believable and gave rise to cogent admissible grounds of appeal that may have affected the jury's verdict.
From the guardian.co.uk
Take a dash of evidence, mix in some impeccable logic, and you can come up with a cogent argument that calcium prevents fractures.