On the other hand, even very detailed descriptions of the neuron do not allow us to understand whole brain functioning. Mathematicians call it a problem of big numbers . We cannot solve function of the brain from the function of each neuron. It is too small part of the brain. Dynamics of fluids or dynamics of weather is not solved in details.
Scientists attempt to solve such problems using different terms.
Neuroscience typically a science that studies details. It goes to the details. Therefore neuroscience often loses sight of the scope of whole brain functioning. There is one possible answer. Neuroscience does not have a device that would allow one to observe or measure whole brain function.