What is thinking? What is the difference between thinking and thought? Thinking implies a progression of time. So perhaps it is equally important to define time. The word thinking is a verb, meaning something (the thinker) is doing something (thinking).
There is a dictionary-type correspondence between processes and formally-defined algorithms. The first is in the realm of the physical universe and the second is in the Platonic realm. This correspondence is like a bridge between the two. (Although Max Tegmark might say there is no essential difference between the two realms.)
Thinking is a process and thoughts are the outputs of algorithms (algorithms exist in the Platonic realm and may or may not be expressible in a natural language). PERHAPS we can identify (concrete) thinking with specific (abstract) algorithms or at least encode one by the other. With that identification made I can see how thinking can be viewed as something abstract.











