the definition of nootropics, as given by the inventor of piracetam.

I don't have the authority to say anything knowledgable. However, I noticed many posts about "nootropics". I'd just like to point out the definition of nootropics, as given by the inventor of piracetam.
Enhance learning and memory.
Enhance learned behaviors under conditions known to disrupt them.
Protect the brain from physical or chemical injury.
Enhance the tonic cortical/subcortical control mechanisms
Exhibit few side effects and extremely low toxicity, while lacking the pharmacology of typical psychotropic drugs (motor stimulation, sedation, etc.