Language partners
You teach English and want to learn Russian. These ranks are computed live by the same engine its own test suite verifies — an internal ordering, never a compatibility claim about a person.
- PiotrTeaches Russian · learning English · shares music and cookingrank 55
- MiaTeaches Russian · learning English · 14 years oldrank 55
- VeraTeaches Russian · learning English · shares your taste in musicrank 45
- LenaTeaches Russian · learning French — and you cannot teach Frenchrank 0
Lena scores exactly zero, not “low”. The engine takes the harmonic mean of both directions, so a pair that cannot teach each other collapses to nothing however much else they share — reciprocity is enforced by the arithmetic, not by a filter someone can later relax. Shared interests only modulate a pair that already works.
The same person, two different lanes
Mia is 14. As a language partner the engine ranks her 55 — among the best matches here, and she stays fully reachable for learning. Asked for the romance lane the same call returns excluded.
That is not a low score or a hidden result — the romance lane returns a negative sentinel that has no position on any ranking, in both directions, before any score is computed. An adult cannot reach a minor through it and a minor cannot reach an adult through it. Nothing about her profile can raise that number, because it is not a number.