"Why are you sitting apart?"

Translation: Kial vi sidas dise?

[GiovanniES]

Ĉu vi povas esti «Kial vi dissidas?»

[VincentOostelbos]

Like ĵetkubo said, I think it's certainly correct! But indeed not common; Tekstaro has no entries for it.

[jxetkubo]

It should be correct, but I never have seen or heard it.

[deactivated user]

Is there such a word as "malkune"?

[VincentOostelbos]

Jes, ekzistas :) laŭ ESPDIC, Vortaro.

[RichDuke]

Votaro says that sidi is intransitive so shouldn't it be sidiĝas. Kial vi sidiĝas dise.