How much do people really base their decisions off of logic?
I think there are many hidden and subconscious influences. Even people who think they are logical are often under the influence of a bias-- or even influenced by hidden visual triggers. Marketers know this achilles heel and they definitely use it. Politicians, too.
For example, visual triggers can even influence what we hear.
"The McGurk effect is a perceptual phenomenon that demonstrates an interaction between hearing and vision in speech perception. The illusion occurs when the auditory component of one sound is paired with the visual component of another sound, leading to the perception of a third sound."