The verse knows were it is at all times. It knows this because it knows where it isn’t. By subtracting where it is from it isn’t, or where it isn’t from where it is (whichever is greater), it attains a difference or deviation. The guidance system uses deviations to generate corrective commands to drive the verse from a position where it is to a position where it isn’t, arriving at a position where it wasn’t, but is now. Consequently, the position where it is, is the position where it wasn’t. So it follows that the position where it was, is the position where it isn’t. In the event that the position where it is now is not the position where it wasn’t, the system has acquired a variation. The variation being the difference between where the verse is and where the verse wasn’t. If the variation is considered to be a significant factor, the verse guidance logic system will allow for the variation, provided that the verse knows where it was or is not now. Due to the variation modifying some of the information obtained by the verse, it is not sure where it is. However, the thought process of the verse is that it is sure where it isn’t, and it knows where it was, It now subtracts where it should be from where it wasn’t and adds the variable obtained by subtracting where it isn’t from where it was. In guidance system “language” this is called error, or the difference between deviation and variation found in the algebraic difference between where the verse shouldn’t be and where it is. Simple. It even knows where it is with all the categories around it.