[ZHereford]

Pain and pleasure are at opposite ends of the spectrum. Is there nothing in between? Not everything is painful or pleasureful. Some things are rather neutral.

My main point is that we do not make choices primarily based on pain and pleasure. There are other more relevant guiding principles that are involved in the process. If you have to go through a ten step process to figure out if something is going to cause pain or pleasure, then what's the point in using it as a barometer for anything? If nothing else it's inefficient use of terminology.