Articles in the explained tag are materials to help in understanding information which are not easy to grasp. It could be from facts and our daily lives, or a fictional story—like a TV series or a movie—which employed complex and/or complicated ideas and methods in its storytelling.

These explained articles are only meant as a guide.

• For factual materials: articles were written based on the author’s knowledge and the available information at the time.
• For fiction: the explanations are based from an in-universe perspective.