Mushroom Identification Guide

• Sold by store: probably safe.
• Not sold by store: probably unsafe.

Here the identification has been outsourced, for better or worse, to the whims of the store owner, the procurement process, any relevant regulations and inspections, and so forth, much like "what to eat" has been outsourced by most cells in a body to some number of other cells. Similarly, "okay to eat" has been outsourced by societies that more or less isolate themselves from nature. Something like a cell wall, only bigger and more abstract.