bacon

The missile knows where it is at all times. It knows this because it knows where it isn't. By subtracting where it is from where it isn't, or where it isn't from where it is (whichever is greater), it obtains a difference, or deviation. The guidance subsystem uses deviations to generate corrective commands to drive the missile from a position where it is to a position where it isn't, and arriving at a position where it wasn't, it now is. Consequently, the position where it is, is now the position that it wasn't, and it follows that the position that it was, is now the position that it isn't.
In the event that the position that it is in is not the position that it wasn't, the system has acquired a variation, the variation being the difference between where the missile is, and where it wasn't. If variation is considered to be a significant factor, it too may be corrected by the GEA. However, the missile must also know where it was.

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hey, sorry I saw your profile and I just thought you looked cute in your picture, I really wanted to tell you that)) It's really rare to see girls playing video games haha! I don't know why its a guy thing honestly im like really against misogyny and like ill be the one in the kitchen making sandwiches. We should really play l4d2 sometime its a really cool zombie game with a lot of scary moments, but don't worry ill be there to protect you ;) sorry that wasnt flirting I swear Im just trying to be friendly I really like your profile picture sorry was that too far? Really sorry i'm really shy I don't go out much haha add me on skype we should talk more you look really nice and fun xxx