single replacement
"We learned how most of these equations work through dating analogies. Synthesis is like when two single people get together to form one couple. Decomposition is like when a couple breaks up into single people. Single replacement is like when a someone leaves their boy/girlfriend for someone else. Double replacement is like when you have two couples and the women switch boyfriends. Combustion is the only one where we didn't learn an analogy. With combustion a hydrocarbon and oxygen combine to make water and carbon dioxide."
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.