MOM test?
Maybe this? https://www.amazon.com/Mom-Test-customers-business-everyone/...
You shouldn't ask your mom about the viability of an idea because she will be biased towards thinking good things about you (and your ideas). Similarly (sort of...), Hacker News will be biased towards wanting your product and not say anything bad about it.
[1] https://helpatmyhome.com/best-non-smart-tv/