Two people can be 90% compatible and still fail — if they never talk

Two people can be 90% compatible and still fail — if they never talk about the 10% that matters most. Differences need daylight.

Why it matters

Lasting relationships are predictable in ways chemistry alone is not. Decades of relationship research point to the same conclusion: shared values, communication style, and how two people handle conflict matter far more than a first-date spark.

Key takeaways

• Two people can be 90% compatible and still fail — if they never talk about the 10% that matters most. Differences need daylight.
• Shared values predict long-term satisfaction better than shared hobbies.
• How a couple handles conflict is compatibility, not the absence of it.

How Nonna helps

Nonna scores every potential match across a 99-question model — values, communication style, life goals and dealbreakers — so the science of compatibility is something you can see, not guess at.