The Theory of Recollection - part 8:
The demonstration - part 4:
The slave is surprised to discover that the double area is not constructed on the double base-line (four units) or on the only other option, the base-line between two and four units, namely. the three-unit line.
When asked to point at yet another base-line, he finds himself in an aporia, and it is worth comparing. this despairing aporia with Meno's wonderful aporia just a little while ago.