Time travel: deleted experiment?

[SymPatHizer]

anyone else noticed that in the old Aperture facility, CJ will say some thing like "the next test is about time travel blah blah blah, you will see your future personality but dont listen to him blah" there is also a post on the wall warning you this. however I didnt see any timetravel thing latter, why?

 

[Danny_ZQ]

Probably because it was just a joke and not an actual part of the test.

 

[JossiRossi]

A you even farther in the future stopped THAT future you from warning you. Of course.

 

[tomemozok]

What if the rat man is from the future, possibly your son or husband, and has come to warn you to stay away from glados, and that the cake is a lie?I think i just broke the code.
YOUR MOVE,GABEN!