It was not just the formidable Baroness who thought that way.
Not just a formidable lawyer, he has brought sound instinct and humanity to his role, noticeably in the guidelines he has published.
It is not just his formidable physical presence — which Evert describes by outlining a V with her hands in the air, starting with the broad shoulders down the narrow hips.
For another thing, O'Brian, not just a formidable researcher but also unrivalled in his breathing of life and fire into archival findings, was amazingly at ease with the sway of artistic license: "It is clear that the writer will soon have originality thrust upon him, for he is running short of history," he says in an author's note.
It's not just Eno's formidable back catalogue of solo material, collaborations and production that continues to inspire a new generation.
He is admired not just for his formidable technical skills as an artist, she said, but also for his focus on the scientific side of landscaping and the attention he paid to plant communities and their relationship to the environment.
Even at 21 he had, said Graeme Murty, who had attempted to mark him for Reading that aforementioned day, "all the attributes", being not just skilful but physically formidable.
Chelsea Clinton, when roused, seems a formidable adversary, not just because she is connected but because she is a sharp observer of systems gone awry.
There are few better examples of genuine social mobility than this son and grandson of Welsh miners who became not just one of the most formidable politicians of his or any other era, but a writer whose books may well be read long after his considerable political achievements are forgotten.
When the Republican National Convention storms into Cleveland in July, the security challenges will be formidable, but not just because the GOP is in turmoil.
Yet the state has met formidable resistance not just from the tobacco industry but also from a fledgling industry of smaller e-cigarette manufacturers and retailers backed by a passionate movement of vapers.
