dream inception? no
external dream manipulation? probably under certain circumstances.
not an expert but you can't ENTER a person's dream, this falls into the category of gemstones having healing powers.
external dream manipulation? probably under certain circumstances.
not an expert but you can't ENTER a person's dream, this falls into the category of gemstones having healing powers.
In the movie, they of course have the technology to do these things, but it’s usually used for “extraction”: stealing information and ideas from one’s subconscious by infiltrating their dreams.
“Inception”, as used in the movie, is just the opposite of “extraction”: to plant an idea in someone’s subconscious by infiltrating their dreams.
So while I think it’s a stretch, it’s not as bad as suggesting that people can commingle in dreams.