This is a question about what kind of references have to be provided when writing answers on Hinduism.SE.
My basic question is: Are modern shlokas, scriptures, views, sayings etc. valid when using them as references? Or are only references from the Vedas, Upanishads, Puranas and other ancient texts considered valid?
Also, what time frame is considered ancient or non-modern? Can a reference given to prove a point from plays, poems, fictional plays etc. valid? E.g., are Kalidasa's plays considered valid and authentic? Books and scriptures of what period i.e., pre-modern, pre-medieval etc. should be referred to for writing answers?