Implicit memory involves incidental, unintentional remembering, whereas explicit memory involves intentional recall. Many theorists argue that implicit and explicit memory rely on different encoding and retrieval processes, while others argue that they are each handled by independent memory systems (procedural – which is memory for actions, skills, operations and conditioned responses, and declarative – which is memory for factual information).
	It is suspected that the declarative memory system handles explicit memory and procedural implicit memory.
	Declarative memory can be subdivided into memory for personal facts (episodic) and memory for general facts (semantic).
	Episodic memory is chronological, or temporally dated, recollections of personal experiences, while semantic memory is not tied to the time when the information was learned.