The plot is fairly simple. Meno has been teaching people morality for a fee and Socrates (with his famous Socratic irony) asks him to teach him morality. Meno tries to do this but ultimately fails because Socrates isn't interested in learning morality, but, rather, is interested in proving that Meno cannot teach morality. Meno then compares him to a stingray that constantly stings others, leaving them unable to respond. Socrates likes that image, but, he believes that this stingray analogy works best if Socrates is also stinging himself. Socrates then explains one of philosophy's first theories of knowledge: the theory of recollection. By teaching a slave how to make a square with twice the area of another square using the Socratic method he proves (though, some scholarship debate whether or not this argument holds strong) that the slave always knew the theorem, that he just had to remember it. Socrates argues that everyone has an immortal soul that remembers all the knowledge we will ever need. So, we don't ever know anything new, so, we don't ever have to know how we know something, we just have to recollect it, thus solving the "Paradox of Inquiry."
Plato would later reject this theory of knowledge in favour of his more famous theory of the forms. This dialogue, while short, is very important in the history of philosophy.
Meno contains examples of:
- Born-Again Immortality: Plato teaches that the soul is immortal in this sense. The soul is immortal and reborn often and, at this point, has memories and innate ideas it learned from previous past lives that the person could "recollect".