The simps knows where mookie is at all times. They know this because they knows where she isn't. By subtracting where she is from where she isn't, or where she isn't from where she is (whichever is greater), they obtains a difference, or deviation. The simp guidance subsystem uses deviations to generate corrective commands to drive the simps from a position where it is to a position closer to mookie, 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 closer to mookie, the system has acquired a variation, the variation being the difference between where mookie is, and where she wasn't. If variation is considered to be a significant factor, it too may be corrected by the GEA. However, the simps must also know where they was.
The simp guidance scenario works as follows. Because a variation has modified some of the information the simps have obtained, it is not sure just where it is. However, it is sure where mookie isn't, within reason, and the simps knows where she was. It now subtracts where the simps should be from where they weren't, or vice-versa, and by differentiating this from the algebraic sum of where the simps shouldn't be, and where they were, they are able to obtain the deviation and its variation, which is called error.
