[__]

As a kid, I said "I don't know" when I didn't know the answer to a question, or when someone asked me to make a poorly defined prediction. Or I'd give a long answer full of qualifications. I quickly learned that although these answers were true, they really irritated people.

"I want to say true things, but apparently other people want to hear lies," I thought to myself. But I now know that it's more nuanced than that. Typical people ("non-geeks") do care about truth when it directly relates to what they're interested in: usually social status and mating, and if they're unfortunate, survival. Generally, they're not interested in more abstract subjects.

I interpreted people way too literally. If they talked or asked about X, I assumed they were curious about X. I didn't grasp that small talk is about entertainment and insecurity: the speakers reassure each other of their companionship; gauge each other's abilities, motivations, and desires; signal tribal affiliation; share gossip; and determine their places in the pecking order. It has nothing to do with X. X is just a pretence.

Even as I became conscious of this, I often acted the same way out of principle. Alas.

[biotech]

I now know that it's more nuanced than that.... X is just a pretence. [sic]

I think that it is even more nuanced than you propose. Often non-geeks are interested in the subject, but may not have sufficient interest or mental energy required for significant, structured thought into the subject. That is the kind of thought that geeks are accustomed to, but to non-geeks, that's what they do at work, not for pleasure (exceptions abound, though. For example, "non-geeks" often put careful thought into sports. Maybe they should be called "sports-geeks").

I regularly am asked questions about technical matters outside of my expertise. I try to draw some logic into the matter, break it down, and come up with a simple, reasonable, and probably accurate answer. If required, the asker is often intelligent enough to come up with a similar answer - or at least an equally plausible one. But they don't want to, so they ask me. And that's okay. If I don't want to think about, I'll tell them I don't know.

[__]

Yes, I was being imprecise by talking about "lack of interest". It's not only lack of interest per se; there are many reasons why someone might not think deeply about a subject. Lack of mental energy due to daily responsibilities is, I'm sure, quite common -- even for geeks.

And it's even more nuanced than that. Someone might be very interested, on an absolute scale, in some subject. But as long as he's even more interested in social reassurance, gossip, networking, status, and so on, he will prefer conversations that revolve around those instead. It's a matter of priority. Yeah, there's a latent physics geek in his brain, but when he asks you about next week's weather, his goal is imprecise small talk, not a discussion of turbulence models.