Ānanda explains to Sandaka the four kinds of teachers who are not worth following and the four kinds of spiritual paths that are not conducive to liberation.
A wanderer teaches that a person has reached the highest attainment when they keep four basic ethical precepts. The Buddha's standards are considerably higher.
A wanderer teaches his doctrine of the "highest splendor" but is unable to give a satisfactory account of what that means. The Buddha memorably compares him to someone who is in love with an idealized women who he has never met.
Starting off similar to the previous, the Buddha goes on to explain that one is not converted to his teaching just because of clever arguments, but because you see in yourself the results of the practice.