It's not known. There's just a thought-picture of A blank piece of paperHow is it known exactly that just a 5 seconds ago this paper was totally blank?
It's not known. Only thought-pictures of a blank piece of paper.How is it known that the paper was ever blank at all?
It's not known. There's only thought linking the pen to the paper. And a thought-memory of writing it.How is it known that the letter 't' is written by me, or by this hand?
It isn't known. There is just what is - the pen touching the paper.Now, put the tip of the pen to the paper as if you were starting to write the next letter, but don't write anything yet.
How is it known that just 2 seconds ago the pen didn't touch the paper, but now it does?
That was harder to see at first. Much easier to see when 'stops' in the movement were made and then it could be seen that it was only a thought that showed change. When movement was slow and continuous, the memory-thoughts 'showing' the 'apparent past' couldn't be detected at first before the next movement occurred. So it did show up as an experience of change at first. After writing lots of 'a's', it was clearer that change was all in thoughts only.Very-very slowly, start to write the next letter 'a'. Watch very carefully.
Is there REALLY an experience of change?
Asking this question helped to answer the above question. Change only occurs in thoughts.If yes, change compare to what?
It isn't known. Only thought-pictures 'remember'.When the letter 'a' is on the paper, how is it known that it wasn't there a few seconds ago?
By this time I had 'taaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' on the paper lol. The moment when there was only 't' on the paper existed only in a thought-picture.So now, there is 'ta' written on the paper.
Where is that moment when there was only 't' on the paper?
It's only being compared to a thought-picture of A blank paper.In order to say that change is being observed, comparison is needed.
What is exactly being compared to this moment when there is 'ta' on the paper?
It is not known. Only thoughts say anything different.Then go on with each letters and do the investigation in the similar way.
You can fill the paper with words, but very slowly, observing every ‘movement’ and supposed ‘change’.
When the paper is full:
How is it known that this paper has ever been blank?
I will do this exercise again with the word 'synelg'. Which is just a word. :)

