Influential Logos

Roger Dooley looks at the non-conscious influence in corporate logos. He mentions the infamous P&G logo and satanism rumor that started back in the 70s. I experienced this example first-hand back then, and was amazed by the level at which it existed in the mind of the populace. Regrettably calls it subliminal, which has its own associations with tests that were done (or not done) before the 70s. Also discussed broadly in Martin Lindstrom's recent book: Buyology.