Sometimes a friend comments on how ugly some car model is in its yellow variant. Then onwards you start realizing that the streets are full of that ugly yellow

Sometimes a friend comments on how ugly some car model is in its yellow variant. Then onwards you start realizing that the streets are full of that ugly yellow car !!! How come? Right after bringing some trivial detail into consciousness, there is a period of time where we are more aware about this arbitrary piece of data. Our brain is a pattern-matching machine, so it does the rest. Want to know if it was the iPhone spying on you? Follow the somewhat scientific (ish) method and take note of absolutely all autocomplete suggestions and make a conscious effort to realize how much relevance they had every time. That way you'll learn to differentiate "coincidence" from coincidence.