When you say I believe I turned off the oven, you are subjectively recalling something. You aren’t looking at the oven, you’re remembering it.

You're also relying on your subjective memory when you look away from the scale to write down the number you read.

There is an accepted protocol on how to read a meniscus in a graduated cylinder for this reason or any scale for that matter.

Oh, now this is fascinating. Tell me, does this "accepted protocol" mean that you don't have to rely on your subjective senses at all? If so, then how, exactly, does the information end up reaching your brain? I would love to know.

This is essentially just, "When someone wears a lab coat, that means it's objective." Even within "accepted protocols" there is still plenty of room for human error.

You are completely wrong about basically everything you've said, and your wrong ideas seem to be a product of the disdain you seem to have for the humanities - a common ailment of people with just enough knowledge of science to be very confidently wrong about things.