Scenario: An "idea guy/gal" comes up with an idea upon which a non-idea guy/gal builds. Scenario: An "idea guy/gal" comes up with an idea and tries with all hi

Scenario: An "idea guy/gal" comes up with an idea upon which a non-idea guy/gal builds. Scenario: An "idea guy/gal" comes up with an idea and tries with all his/her might to bring it to reality, but fails. Yet, the idea is proven "useful", posthumously. Ever heard of Babbage? Babbage wasn't "useful"? Useful: What a dreadful word to use for a person. Are you useful?