"If you are into homemade lemonade, a good analogy of slack or productivity is how much juice you can squeeze out of each lemon before you increase the number of lemons."
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.