The story
- German · calque ofdialektischer Sprung
- English todayqualitative leap
Modified from dialectical leap, the latter a calque of German dialektischer Sprung, a concept from Hegel's dialectical method. The modifier qualitative means that the leap in question is a transition in quality, where the latter should be understood in its original sense of “what-ness”, that is, the kind or nature of something.
Etymology from Wiktionary, CC BY-SA 4.0.