A Quote from Portal 1
GLaDOS
The Enrichment Center reminds you that the Weighted Companion Cube will never threaten to stab you and, in fact, cannot speak.
More quotes from Portal 1
As part of a required Enrichment Center protocol, the previous statement that we would not monitor the test area was a complete fabrication. We will stop enhancing the truth in three... two... zzzt
The Enrichment Center is required to remind you that the Weighted Companion Cube cannot talk. In the event that it does talk The Enrichment Centre asks you to ignore its advice.
That thing you burned up isn't important to me; it's the fluid catalytic cracking unit. It makes shoes for orphans... nice job breaking it, hero.
This is your fault. I'm going to kill you. And all the cake is gone. You don't even care, do you?
Do you think I'm trying to trick you with reverse psychology? I mean, seriously, now.