Maybe more than one person owns the same belt (two sisters have one belt they both wear). Or two people made one belt together (say, two designers). It's a strange sentence but not entirely impossible given the right context.
It makes me think of a ladies' martial arts class. If I were describing the different levels and belt colors, I might say of the beginners, "Their belt is white/O cinto delas é branco."
This could make sense in a batizado at my capoeira school. . . "Their (level of) belt is white, signifying that they are first level beginners"
O cinto delas é branco = 1 belt and 2 or more women
Os cintos delas são brancos = 2 or more belts and 2 or more women
O cinto dela é branco = 1 belt, 1 woman
Os cintos dela são brancos = 2 or more belts and 1 woman
So the verb "ser" is related to the belt and not the women! Good to know! I'm usually not a fan of grammar, but it's interesting to see some grammar sense in here :-)
The word "their" implies more than one person. How can more than one person wear one belt? The sentence is nonsence!
In on moment I have a doubt too.. However it is correct. I understand the sentence thinking on the same colour of the belts for the women. Not impossible.
Objects can be owned by more than one individual. O carro delas é branco. Their car is white.
I almost didn't type "their belt is white" because it doesn't make sense. But I typed it anyway, having no other alternative.
I know, it didn´t make sense to me either, so I wrote their belts are white... and go it wrong. Was it supposed to trick us, or just confuse us??? They need to start making up sentences that make sense!
I agree. If the sentence was about belts nobody would have a problem with this. If its to show "delaS" can gi with a singular noun it is easy to think if a sentence that makes sense. Their house is white.
Why is everyone reaching so hard to believe this sentence would ever be uttered in any circumstance?
Because in English if you are talking about different people wearing white belts you would say "their belts are white"
In this instance can we say "Eles cintos é branco" but we specifically use "delas" because we can confirm that we are talking about women?
Their blet is white = Seu cinto é branco (formal) ; O cinto deles é branco (if it is a group of entities of unknown gender or if there is at least one entity of masculine gender) ; O cinto delas é branco (if all entities in the group have feminine gender)
"Eles cintos" is plural then cannot be "é branco" (singular) The sentence is plural for the woman (women) and singular for the colour of the belt. Maybe an uniform...
You can't say 'eles cintos', because that means 'they [masc.] belts'.
You could write "O cinto é branco"/"The belt is white", ...but that would be changing Duo's sentence.