Killing a Vegan: Degrees of Subjectivity

Have you ever Stepped on a nail and not felt it--then: Pain Strikes you. You've been standing on the nail for a minute, but because you had your mind focused on the hottie walking by, you didn't notice it. This is revealing. It reveals that pain (the phenomenological pain) is a process of higher order functions. The "I" becomes aware of the of the pain and then it becomes "I-pain". In psychology, there is a distinction between aversive reactions and physiological response to a stimuli and the phenomenological pain response to a stimuli. Aversive reactions can take place without pain, but are many times accompanied by pain---emotional or physical, which are processed in the same area of the brain (see last months Scientific American). Now, humans and higher order animals can feel pain, but lower order animals may not feel phenomenological pain because they don't have the "I" concept or the ability the higher order brain functions to process suffering as anything more than a stimuli and response. When we talk about ethics with animals, we should consider degrees of suffering.