Another way to view this is with a computer analogy. There are both hardware and software people when it comes to computers. The brain should be no different. From the outside, are the brain hardware people and from the inside are the brain software people. Both help with understanding with a two prone attack a better way to approach the problem.
For example, consciousness can't be defined by hardware, alone, without postulating unknown physics. However, consciousness is a given with respect to the software side, where anyone can experience this to know that it exists. At the same time, drugs might increase dreams, so there is also a hardware connection beyond software.
Sometimes the two are ambiguous. For example, there are audio cards for computer hardware that allow better music quality from a PC. Better music quality can also be done with software. Some things are not clear cut, which is why a two pronged attack is best.
I did not have access to physical resources, so this limited a hardware side approach by me. What I did have was a brain and mind, which is free, so the software side was possible without any extra resources. This is why this could be done with little expense.