ok-i somehow thought that you were meaning measurement only is constant ... somewhere else i stated that i personally think you cannot accept all human made measurement instruments in an universal (or rather close to) meaning - sure we will find them very useful within our solar system - but beyond?? - i'm not sure if i shall accept or not .... i'll accept new measurements if humans ever get way beyond moon in person + instruments - but even then you cannot be 100% sure about measurements .... first thing we have to do is - (my guess) - getting some kind of instant messaging system (i'm not talking about msn messenger
)between earth and probes/ships/+++ ...
and i do know basics about light travelling thru glass, water, sugar, salt, etc...
self-conscious can mean both the contraries??? you kind of confused me again?