There is no room for vagueness. It allows for the most efficient use of limited knowledge and is more universal. The turtle in Logo's first version was precise. Forward 150 steps was an exact command that would be followed. Papert gives an example of the power of being vague.
Interactive programming using a cybernetic turtle can bring students to a higher level of thought.
If students program vague instructions that vary depending on the circumstances, they ultimately develop a program that is more adaptable for other requirements. Papert's example was the cybernetic turtle walking around the perimeter of a shape. If students measured the shape, then they could precisely program the turtle to move forward 150 steps, left 150 steps, etc. and the turtle would walk the perimeter of the shape. But using vague programming, the student can program a turtle that could walk around the perimeter of any shape. Computer As described in the previous example, the computer can be used as an effective tool to teach thinking.