Hm...
That being the case, It is possible that I, not playing the role of detective in my imagination, am not a completely reliable observer of my own reality. If this is true, then any situation where I have observed Rena-chan's existence (osu!chat, IRC, MSN), could be subconsciously falsified in order to throw detectives off of the truth as to what really happens.
In theory, due to this, It is possible that by extension, other members of the forum, possibly osu! itself, are merely figments of flawed observations.
There is no osu!.
There never was.