Also, it is capital letter because it is named after this guy: https://en.wikipedia.org/wiki/Sim%C3%A9on_Denis_Poisson

Has an amazingly long list of things named after him: https://en.wikipedia.org/wiki/List_of_things_named_after_Sim...

Thank you--in spite of my stats background, I assumed the author was conveying their distaste for proof-of-work.

Because: one person's fish is another person's poisson.

Thanks. I actually typed it multiple times and spelled it correctly while fighting autocorrect, but it won in the end.

(journalist voice) One might say it is a poison. For the planet, that is