FortyTwo
Custom Title
well, the one I posted earlier. That is in science you are always going to need instruments, including your eyes and brain.
How can you really be sure how those instruments work? To find out how those work, you have to do experiments using those very instruments. Any error in understanding how your instruments work will lead to a faulty understanding of your results....it's a sort of catch 22......not explaining myself very well, but maybe you understand what I mean.
No, I get you. But I also think that's why we invented instruments and the like in the first place - instead of trusting our minds, we can trust something that we know is constant. The marks on a ruler are not going to spontaneously change, even if it is viewed by two different people.