One of the inputs or outputs of syllogisms represented by truth tables,
compare Category:Syllogism charts with all minterm lists

Each of these 256 cubes stands for one proposition (minterm) that can actually be the case. The cube vertices correspond to Venn diagram areas, and a dark vertex means that the area is not empty.
Own work
WatchduckYou can name the author as "T. Piesk", "Tilman Piesk" or "Watchduck".