Each concept here is mapped to its prerequisites — the ideas you'd need first to understand it — all the way down to four foundations: Space, Time, Energy, Pattern. Click any prerequisite to drill down, or scroll for the chain graph.
A mandolin is a physical instrument that produces sound through plucked strings, which requires sound that in turn requires matter and wave, and is often made from wood that requires environment and space.
External reference — all senses of the word “Mandolin” on Wiktionary. This atlas concept maps to only the slice of meaning relevant to the prerequisite graph.