On: “Super Engine” may fundamentally change the way internal combustion engines work

[Grishnakh]

>I downvoted you because your comment doesn't contribute anything useful to the discussion

Sorry to go off-topic, but how do you down-vote people? I've looked through the FAQs and everything and can't find anything about it. I only have the ability to up-vote.

[dredmorbius → Grishnakh]

Once you accrue enough karma (~1,000 points IIRC, though that may vary) you'll get a downvote button.

It's conveniently placed close enough to the upvote button that on mobile, any moderation action is essentially a 50-50 probability of either....