Comment by mncharity

As with genes, duplication creates opportunity for specialization. Regardless of what drives the duplication and early divergence.

AIchat "compare and contrast the subtle implications of phrase/X with phrase/Y" suggests using "ad spend" for a number (like "budget"), and "ad spending" for activity and trend ("act of spending").

"Learns" has implications of discovery, smaller size, iterative, informality, individual/team scale, messy, and more. For illustration, to my ear, "Don't be stupid" fits as a "lesson", but not as a "learn" or a "takeaway". Nor as a "lesson learned", with its implication of formality and reflection. "Software X is flaky" fits better "learn" than "lesson". And "unmonitored vendor excursions are biting us" more a "takeaway" (actionable; practical vs process).