I've had to externalize this behavior since having children: "I don't know. But we can look it up."

I do this all the time anyway-- need to decompose an audio sample? I have no clue, but I can read about it ... oh, look FFT. Calculate a loan schedule? Think I was curious about that several years back ... Google amortization ... Got it.

My children think I'm a genius (I have a 17yo that still thinks her dad is the smartest human on the planet) simply because A) I will deduce an answer aloud, B) admit that it's a guess but plausible, C) research when we get home, and D) summarize the findings (including my mistakes in deduction) in language they can understand. And I learn something along the way.

Can't learn past 30? Bullshit. I learn every day and plan to for the remainder of my life.