noninterchangeable

"You're still working around the notion of noninterchangeable space-time continuums, Dr. Jon?"

The Period of Labor is just starting, and remember how you fellows used to bat my ears down about there being definite and noninterchangeable times for work and for play and so forth?"

They come in two noninterchangeable film types: 35-millimeter, which is the venerable world standard, and Advanced Photo System, or A.P.S. A.P.S. film is smaller, and so are the cameras that use it.

He touches on the unique and noninterchangeable skills of his players, the proven tendencies of his own and the opposing players, the age of the opposing pitcher, the size of the ball park, injuries, and the Astros' batting order, in addition to the constantly altering details of the game situation.