.. considering doing a chatbot (whatsapp or discord) and then call some API to trigger the alexa routine. i don't know why this is not implemented officially. Conditionally trigger something is quite a useful tool to have.

I can't speak for Alexa, but google on my phone frequently seems to mis-trigger, thinking it's heard the 'OK Google' when there is just noise. It doesn't seem to happen when the environment is quiet, but sometimes when I'm driving, or of people are moving around, it will trigger.

Related article (in German) describing how a synthetic fingerprint can match 2/3 patterns used for unlocking phones. A more general example of false correlation (and how non-natural data may show false fits more easily than data constrained by it's anticipated source).

This is a good example of why it is important to validate sensor data before using it. Your CCTV can (often) be blinded by a laser, or your entropy source flatlined by EMC interference. Both of these can easily be detected (and are equivalent to the sensor failing open/closed-circuit) but wouldn't necessarily be identified as important to test for when you're developing an IoT device.

I don't think there's any way to do this. You could get a voice remote, sync it, and then sneak off to the bathroom or something, and use "simon says" to ask through it.

Edit; You might also be able to do something with messaging? Send her a message asking the question, and then plug the dot in, and it should have the message waiting.

"Alexa, repeat" has worked for me.