SBF said-
That is exactly what I am saying, in contrast with the view that the reality of any situation can be determined 100%. The key word here is "useful" and the key absence is "truth".
I tend to agree if you're saying that there are no absolute "truths" (eg Einstein's theory of relativity suggests that Newton's laws are limited to our plane of existence, and break down in black holes, etc), and it's only a fool's quest to find them (and that includes "moral laws").
I am making two points. One is that we can never be certain we perceive reality as it really is.
Yup, and that's why we all build a MODEL of reality in our brains: it's NOT the reality itself, only our PERCEPTION of what is "out there".
eg humans are known to see (perceive) colors differently, so their perception of green is different from mine. Via the CONVENTION of language, we all agree that light of 540nm is going to be called 'yellow', regardless of how we perceive it; individual perceptions created in the brain are KNOWN to vary amongst individuals. So who's right? No one can ABSOLUTELY declare what the perception of 'yellow' is or SHOULD be, and that's why we adopt a STANDARDIZED definition (540nm). Just realize, the CONVENTION is not the reality, either, just an attempt and agreement to identify the stimulus in a consistent manner.
The second is that even if we could see reality as it really is then language is not equipped to transmit any stable conception of that reality.
True, too. Language changes, as I posted earlier today on the Adam and Eve thread, using the example of phrase, 'Big Brother'. Meanings aren't locked in, and hence the difficulty of reading a book written 2,500 yrs ago and thinking you're going to understand the message in the original context. It's nuts to think a layperson can, but the vast majority of the population will, without giving it a second thought.
Nevertheless, the lack of absolutes and certainty is NOT some excuse for us to do NOTHING, as if giving up in a nihilist defeatist funk. We're here, and we've gotta do something with our time besides knocking on doors telling others that absolutes exist. :)
Meaning and morality are where we find/make it, being largely controlled by one's cultural influences.
IMO,
Adam