List mismatches

Before you borrow anything, write down where the two domains break apart: which roles have no counterpart, which relations run backward, which facts about the source are simply false in the target. Naming these out loud marks the boundary past which the analogy stops carrying weight.

Before you borrow anything, write down where the two domains break apart: which roles have no counterpart, which relations run backward, which facts about the source are simply false in the target. Naming these out loud marks the boundary past which the analogy stops carrying weight.

Example

For immune-system-as-security-operation you write three breaks: no security force attacks its own headquarters, so autoimmunity has no analog; guards are hired, while T cells are selected in the thymus; and there is no commander issuing orders, so escalation is chemical, not chain of command.