Align roles and relations

Write out an explicit pair list: each piece of the familiar domain matched to the piece in the new one that does the same job. Match by function in the system, never by what things look like or are called.

Write out an explicit pair list: each piece of the familiar domain matched to the piece in the new one that does the same job. Match by function in the system, never by what things look like or are called.

Example

For the immune system you write four pairs: patrol officer equals macrophage, checkpoint ID equals antigen receptor, most-wanted list equals memory B cell, radio dispatch equals cytokine signal. Each pairing names the job, so "both are small and round" never qualifies.