"It is not an exact analogy," Spock said, "but it is close."
An exact analogy is found in cartography.
"It isn't an exact analogy with books, of course, but it started us thinking seriously about it again," he said.
Not an exact analogy, but a close one that he never even considered.
"This would be in exact analogy with what happens inside the Earth with volcanic processes," he said.
These are exact and very clever analogies for New Orleans-style improvisation.
Poems make their own music, so it's hard to come up with an exact analogy.
There's an exact analogy with language.
His tumbling struggle in the undertow just now was the exact analogy of his struggle with her in real life.
Images are then reconstructed from the set of measured Fourier components in exact mathematical analogy to multi-baseline radio interferometry.