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//There appears to be at least enough similarity in most peoples shared experience however to agree when to stop and when to go at a stop light.//
But chrisgel cannot tell the difference between red and green so presumably he has to go by the position of the light, top or bottom, and for those with full colour differentiation, as long as there is consistency within each person's vision there would be no conflict if what A sees as red, B sees (moving round the spectrum) as orange or violet - would it?
I'm wondering, if the final analysis has to come through the filter of the individual mind, whether we are all experiencing what we think everyone else is.