Here is the definition of backbiting according to the Prophet Muhammad (saw):
Prophet Muhammad said :"Do you know what backbiting is?" They said, "God and His Messenger know best." He then said, "It is to say something about your brother that he would dislike." Someone asked him, "But what if what I say is true?" The Messenger of God said, "If what you say about him is true, you are backbiting him, but if it is not true then you have slandered him." (Muslim)
So would these be considered backbiting? ---
1) If, in a discussion about allophones with my friend, I mentioned that certain people of Indian/Pakistani origin mix up the sounds "v" and "w" a lot.
2) If I mentioned to my friend that I saw a guy in the computer lab having "cherry blossom" as his gmail theme (without any additional comments).
I know that this seems like an extremely trivial question, but I've always wondered about the precise definition of backbiting. I mean, how would I know if the person/people I talk about would have disliked the "facts" that I state about them? Everyone is different. Do I just put myself in their shoes and use that as a standard? If any knowledgeable person could answer me, I would really appreciate it. Thanks.

