What are the only things of which you are completely certain? E.g. That you think
I know that I exist. Beyond that everything else is conditional.
100% certain? Nothing!
99.99% certain? Many things!
How do you know that you think?
That nothing is certain.
What a deliciously ambiguous comment!
All Bill really knows is that some sort of experience is happening and he calls it conscious awareness.
What does it all mean? Bill is bewildered. He suspects that he is an illusion and that conscious awareness is everything.
The weeds are growing and the dog droppings are falling.