The phrase "a rigid separation between" is correct and usable in written English.
It can be used to describe a strict or inflexible distinction between two or more entities, concepts, or groups.
Example: "The study highlights a rigid separation between social classes, which affects access to education and healthcare."
Alternatives: "a strict division between" or "an inflexible distinction between".
From the 1950s on, Chinese governments enforced a rigid separation between urban and rural areas.
If Rousseau was right about our moral needs, a rigid separation between political and theological principles might not be psychologically sustainable.
It has always been an article of faith at The New York Times that rigorous reporting requires a rigid separation between news and opinion.
But in the unsatisfying aftermath of Rick Wagoner's demise, we must rid ourselves of the illusion that there's a rigid separation between Wall Street and what John Rich calls "the real world".
To enable collaboration between human and robot, safety measures that establish a rigid separation between human and robot workspaces have to be removed.
In these cases, it is hard to imagine a rigid separation between TEK and science and technology because TEK systems can incorporate scientific techniques.
In his speech to the rectors, Germany's Chancellor Gerhard Schröder demanded a new spirit of collaboration between science and the economy: "A rigid separation of industry and universities harms economic and technical--and hence social--development in Germany".
A rigid separation of that sort would not suit most western countries.
FOR decades Saudi Arabia's religious police have enforced a rigid separation of the sexes in public places.
It does not accept a rigid separation of knowledge and aesthetic appreciation.
One of the questions we're now grappling with is, "Can we get away from this rigid separation between intramural and extramural?" It becomes really interesting when you think about something like [the rare diseases program] which is technically an intramural program, but 90% of what they do is done with extramural collaborations.
