1. Is the Brain a Turing Machine?
-Based on John R Searle’s “Is the Brain a Digital Computer?”

2. What is Computation?
Computation is defined syntactically in terms of symbol manipulation.
syntax and symbols are not defined in terms of physics though symbol tokens are always physical tokens.
computation is not discovered in the physics, it is assigned to it.
Syntax and symbols are observer relative.

3. Computational Machines
Nothing is intrinsically a (computational) machine, although you can assign a computational interpretation to it
The point is not that the claim "The brain is a digital computer" is false.

4. Homunculus Fallacy
Homunculus is in a system interpreting the physics in both syntactical and semantic terms.
Humunculus Fallacy – Where is the homunculus when we are saying “The brain is a turing machine.”
Humunculus fallacy cannot be removed by the standard recursive decomposition arguments.