As another commenter pointed out, the key is to use an example as a starting point and then refine from there. "X is like Y, but different in these ways". Compa

As another commenter pointed out, the key is to use an example as a starting point and then refine from there. "X is like Y, but different in these ways". Comparisons don't muddy the waters; they give people a quantum-leap from 0% understanding to 70% or 90% understanding, from which point the remaining gap can be filled in at the usual rate. To ignore this is to ignore human nature.