Software bug? I typed "na televizi se dívejme co nejmíň" which as far as I can tell is the same answer it gave as correct...but it said I was wrong. The "report" link offered three options which did NOT include "my answer should be accepted"
I'd suggest to make a screenshot and report in the troubleshooting section, not here.
"Let´s watch TV as little as possible" is not correct?
Possible and accepted, provided you use the correct character for the apostrophe, that means ' and not `.