Given the context, I choose to believe smth means “shaking my tiny head”.

She could be Canadian. Keep your wits about you and watch for signs…

It’s also worth noting that older humans tend not to hear those sounds as well. This doesn’t explain much, though, because all lot of their other targets hear those pitches just fine.

Pretty sure there was a TV in every home and they were surveillance devices

I had a teacher tell me women couldn’t get hemophilia because it’s a sex-linked gene. True enough, but it’s on the X chromosome, and what do you suppose happens if a woman has that gene on both of them… I lost points on a test because of that.

This was before the internet, so I couldn’t easily find answers to prove he was wrong.

Moving fast and breaking things can be a great R&D philosophy…when health and safety aren’t a concern or have been addressed.