The rational reasons for an answer being dropped can be any one or more among the following:
1. The answer that has manifold linguistic errors and it fails to reflect a sensible meaning.
2. Being too short; the answer which could not provide an explanation, if it is either too short or contains just images/links that are not self-explanatory.
3. The content of the answer not being relatable to the question asked.
4. It containing information/message that is in any manner disrespectful or offending a person, community, belief or religion.