tetrad
"If we extend the triad of Executive, Judicial and Legislative powers to a tetrad we can construct, Word (Law), Executive, Judicial, Legislative, or Executive, Judicial, Legislative, and People, or Body. The tetrad is like the duad in that there is a great deal of polarity between the units. The Pentad shows a balance or harmony of the American people that was meant to be kept by using the device of the Constitution."
"Each of the four components of the tetrad is like a link of a chain: If one is weak, the system, as a whole, is weak. If one is broken, the system, as a whole, breaks down."
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.