The truth behind "The cake is a lie"

I've been extremely bored recently so I decided to start blogging once again. Today I shall explain to the best of my ability what the phrase "The Cake is a Lie" means.

Urbandictionary.com defines it as:

Roughly translates to "your promised reward is merely a fictitious motivator". Popularized by the game "Portal" (found on Valve's "Orange Box" game release for PC, XBox 360 and PS3). During the game, an electronic voice encourages you to solve intricate puzzles using cake as a motivating perk. When you have "broken out" of the game's initial testing phase (from threat of death), you find scrawls on walls of the innards of the testing center warning you that "the cake is a lie".

Employee #1: Yo, Dave, manager says we will probably get a promotion if we meet the sales expectations for this quarter.

Employee #2: Yeah, so, don't get your hopes up on that one, Ed. The cake is a lie.

Employee #1: Really, aw crap.

So there you have it, I didn't really explain it, but who gives a crap rite? You have an answer now.

kthxbai