"We will know on Sunday."
Translation:Będziemy wiedzieć w niedzielę.
In sentences like this, are the words "wiedziały" and "wiedzieć" totally interchangeable? If there's any difference in usage or translation, can someone tell me?
It can be:
"Będziemy wiedzieć w niedzielę."
"Będziemy wiedzieli w niedzielę." (for a group of men or mixed group)
"Będziemy wiedziały w niedzielę." (for a group of women)
So you can always use the first sentence regardless gender of people. You can use the second sentence if you talk as a group of men or mixed group. The third sentence can be used by a group of women.
Is there any kind of advantage to using either of the last two sentences besides making the gender makeup of the group more clear?
It seems easier just to always use the first sentence but i dont want to appear intentionally vague.
Or maybe that would just make me mysterious...
Yes. Without a noun, it doesn't make much sense. "Będziemy znać odpowiedź" - sure. But while "wiedzieć" itself can just 'go back' to the context, "znać" would really sound weird.