Yes, a question can be answered without signing in, but not signing in means you do not get the contribution points, and the last edit would show up as an ID rather than your user name.
A question without an answer is typically referred to as a "rhetorical question." Rhetorical questions are asked for effect or to make a point, but they are not meant to be answered literally.
No one. Such questions, without a referent cannot be answered
Rhetorical question
Without seeing the bag the question can't be answered. There are other factors to determine if it is authentic.
Without more information, this question cannot be answered. Who is the she and who is the you?
Your question cannot be answered without context.
This question can't be answered without knowing who is meant by "he" and "them".
The question cannot be answered without the context.
Without knowning who "he" was in name, this question can not be answered.
Without specifying an "it", the question cannot be answered.
No, if a question has no answer how is it possible it has been answered?
Without more information your question can not be answered.