>*"I will read and save them again later"* Ok :) >*"if I am speaking fluently one minute, I experience a blockage the next. I can't understand it."* Why do we speak fluently one minute, and we stutter a lot in the following minute? Tonic dopamine (on a minute-hourly timeframe) in itself cannot directly affect fluency on a millisecond timeframe, from word to word or from moment to moment. Which I've explained in the [PDF file](https://docs.google.com/document/d/1WHq599nouADIqkVlAPIXgHECLhwaGvMq5BVnVYI087s/edit?usp=sharing). So I think it's far more likely that conditioned stimuli and its value judgement primarily influence your fluency at one minute, and in the other minute you experience many blockages. I've explained it more in detail in this [PDF ](https://drive.google.com/file/d/17yabjendxTn4i4XFFwVO4btGpJb-2idf/view?usp=sharing)document.