hairsplitting distinction

Translations
Углубление в мелкие различия
The lawyer's case relied on a hairsplitting distinction between definitions.
Дело адвоката основывалось на углублении в мелкие различия между определениями.
Definitions
A hairsplitting distinction is a very fine, subtle, or overly precise difference between two things, often considered unnecessary or trivial. It usually refers to making distinctions that are so minor that they seem insignificant or pedantic.