What does it mean that cultural context is invisible until crossed?

Your cultural assumptions are invisible to you until you encounter a different culture.

Example: An American engineer gives direct, critical feedback in a code review: 'This approach is wrong — here's why.' They consider this helpful and efficient. Their Japanese colleague reads the same comment as a public humiliation that damages the relationship. Neither person is being unreasonable. They're operating from cultural defaults about directness, face-saving, and what 'helpfulness' means — defaults that were invisible to both until the collision.

Try this: Pick one belief you hold about how communication 'should' work — for example, 'people should say what they mean directly' or 'good leaders listen before speaking.' Now research how that norm operates in three different cultures. Write down the cultural logic behind each variation. The goal is not to abandon your norm but to see it as a norm rather than a law of nature.