Asks if a given concept is realistic in a given context. Answers should say yes or no, with supporting info. Compare this with the science-based and hard-science tags. This tag should never be the only tag on a question, because this tag frames how a question should be answered, not the topic.

Unlike and , questions do not necessarily require a scientific explanation. The approach for questions with this tag should be to ensure logical consistency. In short, does the concept make sense, given the rules specified?

Answers to the question should determine whether or not certain elements of the question are appropriate or realistic, or, contrarily, are likely to break a user's or reader's suspension of disbelief. Said another way, the question is testing the questioner's rules and/or the consistent use of the rules and not just asking about the plausibility, feasibility, or believability of something vs. the rules. Although details are appreciated, answers should be of the form:

  • Yes, because (explain how the concept is supported by the proposed rules).

  • No, because (explain how the concept violates the proposed rules and, if possible, how the rules or concept can be modified to make them consistent).

Considering the acceptability of real world questions in a worldbuilding context, it should be noted that a against the Real World is off-topic because the Real World's rules do not require testing and are immutable. Questions seeking to test the viability of a fictional concept against the Real World should be using the tag.

People answering questions should keep in mind that some things may be realistic in-world due to various factors (e.g. giants or other creatures) not present in our world, even if these are impossible in our reality.

Rejecting the premise put forth in the question is only allowed if it is to point out logical inconsistencies and offering a solution is recommended.

If you want scientifically plausible answers consider also using .

If you want only scientifically supported answers, including citations, also use .