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The term “agnostic” originated from Greek where it means “without knowledge.” Therefore, logic that is sufficiently generic so that it is not specific to (has no knowledge of) a particular parent task is classified as agnostic logic. Because knowledge specific to single purpose tasks is intentionally omitted, agnostic logic is considered multi-purpose. On the flipside, logic that is specific to (contains knowledge of) a single-purpose task is labeled as non-agnostic logic.
Another way of thinking about agnostic and non-agnostic logic is to focus on the extent to which the logic can be repurposed. Because agnostic logic is expected to be multi-purpose, it is subject to the Service Reusability principle with the intention of turning it into highly reusable logic. Once reusable, this logic is truly multi-purpose in that it, as a software program (or service), can be used to automate multiple business processes.