The correct usage of CAN and COULD in American Casual, Spoken English using "Modal Verbs", general rules to go by (never hard and fast or forever, always, aka: always exceptions but here's a really good start)
Hopefully this makes "imply" and "infer" easier for you to use!
Psychoactive drugs are chemical substances that affect the brain. These medications can affect out central nervous system and change the way we feel, act or percept things. Psychoactive drugs are used as medications, to treat different medical conditions,