An interesting question to ask about a fully intact and functional brain’s cognitive abilities is this: how do we know that each individual’s perception isn’t unique, whether it’s visual, olfactory, or of any other sense? Processing and emotional responses aside – how do we know that people actually see things the same way, physically? The color I identify as red might appear as residing on the opposite end of the spectrum to someone else, despite the light’s wavelength being constant. The smell I identify as vanilla may be different from another person’s perception of vanilla’s odor, but because we are both correctly identifying the scent as that of vanilla, it is both futile and impossible to determine whether or not the stimulus is perceived identically between the two people.

Enter science! Everyone’s nose (at least those without ‘abnormalities’) has the same scent molecule receptors, meaning we all have the same capabilities for smelling the odors in the air (yes, they are molecules! they are not magically dispersed by the scent fairies, contrary to popular belief).  Continue reading →