A familiar scent reappears after a long absence
A scent that matches no familiar memory or recognizable source
Some scents do not lead to a specific memory
A scent appears without any obvious physical source.
A scent appears alongside a noticeable emotional shift.
A scent is recognized during a dream or immediately after waking
A scent is recognized by multiple people within the same period of time
A scent appears while the body or awareness is shifting from one state to another
A scent that appeared repeatedly suddenly no longer returns