Chemistry is not compatibility
Two people can have extraordinary chemistry and incompatible expectations. The feeling is not evidence about the structure.
Updated 2026-09-02 · Reviewed against WORTH's methodology
They answer different questions
Chemistry answers: what happens to me when I am near this person? It is fast, physical, largely involuntary, and it is real. Compatibility answers a slower question: when the two of us make a hundred ordinary decisions a year, do we tend to arrive in the same place?
Neither one predicts the other. High chemistry with low compatibility produces a relationship that is intense and exhausting. Low chemistry with high compatibility produces a relationship that works and feels unlived. Most people only have language for the first axis, so they describe a structural problem in emotional terms — and try to fix it with more intensity.
Why the confusion survives
Chemistry is legible immediately. Compatibility only becomes visible in the accumulation: how money is decided, how conflict ends, how much solitude each person needs, whose career bends, what happens when one of you is unwell.
By the time those patterns are readable, the relationship already has history. So the early question — is this person right for me? — gets answered by the only data available, which is the feeling.
What is actually measurable
You cannot measure chemistry usefully, and WORTH does not try. What can be measured is difference: how far apart two people are on what they expect, what they experience, and what each believes the other experiences.
That third one is where most damage lives. Partners rarely disagree about everything. They disagree about a few things, and misread each other about many more. A difference you both know about is a negotiation. A difference only one of you can see is a slow injury.
A better question to ask
Instead of "do we still have chemistry?", ask: where do we think we agree and actually do not, and where do we think we disagree and actually do not? Both answers are useful, and only the second one is ever good news.
That is the question WORTH is built around. Both people answer independently, nobody sees the other's raw answers, and what comes back is the distance between the two accounts — with the evidence attached.