As I understand it, “perception” means how people perceive or understand situations, thoughts or things. Since all understanding is based on our previous experiences, and since most people will have had different experiences (and hence memories), then no two people will perceive the “same” thing in the same way. This, of course, leads very quickly to misunderstandings and communication errors between individuals. The worst scenario is when two people agree that they have “understood” each other without checking what has been understood. In fact, they can never understand each other, unless of course they share the same consciousness. This leads to theories about collective common consciousness which are hard to prove. Such collective common consciousness might be attributed to quantum coupling between human minds (quantum entanglement or Einstein’s “spooky action at a distance”). Another explanation is that individuals may access the Akashic Records and “download” information from there.