Question

They are identical twins, and if they dress the same, everybody has trouble telling them apart.

Accepted Answer

(idiomatichttps://en.wiktionary.org/wiki/Appendix:Glossary#idiomatic) To perceive things as different, or to perceive their difference itself; to differentiatehttps://en.wiktionary.org/wiki/differentiate, distinguishhttps://en.wiktionary.org/wiki/distinguish, discriminatehttps://en.wiktionary.org/wiki/discriminate.

Sentence	They are identical twins, and if they dress the same, everybody has trouble telling them apart.
Definition	( idiomatic https://en.wiktionary.org/wiki/Appendix:Glossary#idiomatic ) To perceive things as different, or to perceive their difference itself; to differentiate https://en.wiktionary.org/wiki/differentiate , distinguish https://en.wiktionary.org/wiki/distinguish , discriminate https://en.wiktionary.org/wiki/discriminate .

Perceive Identical Twins Dress Trouble Telling Things Difference