This showed up as a fill in the blank with the choices "deas" or "deae." Unfortunately, while I know that they wanted "deas," I think "deae" also works if the sentence is intended to mean "We goddesses see." Am I wrong? I think there was a similar problem with another sentence where the choices were "dei" and "deos."
It couldn't be "deae", as it's an accusative, object of the verb to see.
If it was: We, goddesses, see. Yes, it would be okay (try to report it).
The lack of commas in Duolingo, changing the whole meaning of things infuriates me. If we use full stop, and "?" sign, we have to use commas.
No. The commas are not appropriate there. "We, goddesses, see" is us addressing the goddesses as an aside as we talk.
It is an essential appositive and commas are not used.
We three kings come bearing gifts.
You kids should stay in school.
My friend Steve owes me money.
You're being overly pedantic, and the addition of "goddesses" is obviously inessential, as your first two links would both admit. The sentence works without it: "We see" is perfectly complete. In a certain context the addition of "goddesses" might be essential (and thus preclude the use of commas), but it is certainly not generally essential, so the use of commas here is fine, even under the rules for appositives that you linked to.
Yes, there is some ambiguity in this case, since the commas could alternatively indicate a direct address to "goddesses" as an interruption, but they don't have to indicate that and language is full of ambiguity.
You've missed the point. I wasn't asked to translate a sentence. I was asked to complete a sentence with either "deas" or "deae." But both choices produce good Latin sentences: the former a sentence where WE love the GODDESSES, and the latter a sentence where WE ARE THE GODDESSES and we love some unspoken object.