It is necessary.
How is anyone going to know where the critical reference of [due/true] 'north' is?
If you want to convince me - without my actually being there to witness it - you're going to do it in a way that is as-nearly-as-possible convincing as if I were there witnessing it myself.
You're willy-nilly suggestion of "just take my word for it" is simply not good enough.
Even "simple physics" - if it is good science - requires making/taking good accurate measurements and proper data recording.
In reality, those to whom you are trying to prove something decide what is "adequate proof" (for them).
If I am going to try to prove something to you - who decides what is "adequate proof" - you or me?
Be honest!
If I say the earth is flat and that what I am going to show you will be "adequate proof" - is that sufficient for you? Or, will you tell me "No, I will decide what will convince me." and expect me to accept that you have to be "convinced" on your terms?
I know you are smart enough to give the right answer here - the only question is - will you...???
If you think that I (or anyone else) is "asking too much" for proof - that is another issue altogether.
However, myself-and-others are not so weak-minded that we will accept your "just take my word for it" attitude and proposal without question.
How is anyone going to know where the critical reference of [due/true] 'north' is?
If you want to convince me - without my actually being there to witness it - you're going to do it in a way that is as-nearly-as-possible convincing as if I were there witnessing it myself.
You're willy-nilly suggestion of "just take my word for it" is simply not good enough.
Even "simple physics" - if it is good science - requires making/taking good accurate measurements and proper data recording.
In reality, those to whom you are trying to prove something decide what is "adequate proof" (for them).
If I am going to try to prove something to you - who decides what is "adequate proof" - you or me?
Be honest!
If I say the earth is flat and that what I am going to show you will be "adequate proof" - is that sufficient for you? Or, will you tell me "No, I will decide what will convince me." and expect me to accept that you have to be "convinced" on your terms?
I know you are smart enough to give the right answer here - the only question is - will you...???
If you think that I (or anyone else) is "asking too much" for proof - that is another issue altogether.
However, myself-and-others are not so weak-minded that we will accept your "just take my word for it" attitude and proposal without question.