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A comment on “Super Engine” may fundamentally change the way internal combustion engines work. Parent comment

Re:“Super Engine” may fundamentally change the way internal ... by Grishnakh on Friday February 26, 2016 @11:58AM (#11182433)
>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.

[ Parent | on HN ]
Re:“Super Engine” may fundamentally change the way internal ... by dredmorbius on Friday February 26, 2016 @02:12PM (#11183343)
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....

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