It is commonplace to describe Richard Nixon with deadened clichés about his unfathomability, his inscrutable complexity.
In Silicon Valley, it is commonplace to talk about technology empowering individuals.
In other art forms, it is commonplace to focus on the work of an individual.
It is commonplace to associate these windows with the Calvinist Dutch enthusiasm for transparency, a moral imperative to display that one has nothing to hide.
Even so, it is commonplace to criticize this vision as naïve, since the goal is unlikely to be achievable anytime soon.
In my home city of Liverpool, I have walked down streets where, before midday, it is commonplace to see people already staggering from drink.
"There are hospitals all around the city, private and public, and it is commonplace to have food trucks out in front of them," she said.
In Hollywood, it is commonplace to find film executives, even film lawyers, who have attended both film school and business school.
On the main road south from the capital to Bouira it is commonplace to run into police roadblocks and sand-bagged control points beside the road.
The essence of the challenge is that America has evolved into a highly mobile country where it is commonplace to have homes in more than one place.
It is commonplace to observe that Hitler's Nuremberg rallies, with their combination of declamation, hypnotic music, mass choreography and dramatic lighting, found their model in Wagner's Bayreuth productions.
