What is the difference between 'betul' and 'benar'?
Would "Ini bukan betul, ini salah" be wrong?
'betul' is an adjective and is negated with 'tidak'.
More info here :
Negation: Tidak, bukan, jangan, belum, Tips & Notes, Addendum.
And still there are sentences like darah kami bukan merah and dia bukan dari Bali here on Duolingo. How are those different than this example? Thanks.