Suspension of disbelief is always a continuum. A drama set in a hospital might have some very reasonable efforts at realism, enough to seem believable to an inf

Suspension of disbelief is always a continuum. A drama set in a hospital might have some very reasonable efforts at realism, enough to seem believable to an informed layperson, while a particular procedural oversight might completely ruin the immersion for a medical doctor in the audience. As a designer, I might see Futura used in a sign in a period piece set two decades before Paul Renner designed the font, but not really care because the grotesks and early geometrics that preceded Futura bear a lot of similarities. But if I see Futura in a period piece set two centuries before the font was in use, that completely destroys the believability of the film's production design.