The German classical scholar
Friedrich Schleiermacher addressed the "Socratic problem" in his essay "The Worth of Socrates as a Philosopher" (published in 1818). Schleiermacher maintained that the two dialogues
Apology and
Crito are purely Socratic. They were, therefore, accurate historical portrayals of the real man, and hence history and not Platonic philosophy at all. All of the other dialogues that Schleiermacher accepted as genuine he considered to be integrally bound together and consistent in their Platonism. Their consistency is related to the three phases of Plato's development: • Foundation works, culminating in
Parmenides; • Transitional works, culminating in two so-called families of dialogues, the first consisting of
Sophist,
Statesman and
Symposium, and the second of
Phaedo and
Philebus; and finally • Constructive works:
Republic,
Timaeus and
Laws. Schleiermacher's views on the chronology of Plato's work are rather controversial. In Schleiermacher's view, the character of Socrates evolves over time into the "Stranger" in Plato's work, and fulfills a critical function in Plato's development, as he appears in the first family above as the "Eleatic Stranger" in
Sophist and
Statesman, and as the "Mantitenean Stranger" in the
Symposium. The "Athenian Stranger" is the main character of Plato's
Laws. Further, the
Sophist–Statesman–Philosopher family makes particularly good sense in this order, as Schleiermacher also maintains that the two dialogues,
Symposium and
Phaedo, show Socrates as the quintessential philosopher in life (guided by
Diotima) and into death, the realm of otherness. Thus the triad announced both in the Sophist and in the Statesman is completed, although the Philosopher, being divided dialectically into a "Stranger" portion and a "Socrates" portion, is not called "The Philosopher"; this philosophical crux is left to the reader to determine. Schleiermacher thus takes the position that the real Socratic problem is understanding the dialectic between the figures of the "Stranger" and "Socrates".
Søren Kierkegaard addressed
the Socratic problem in Theses II, III and VII of his
On the Concept of Irony with Continual Reference to Socrates (1841).
Karl Popper, who considered himself to be a disciple of Socrates, wrote about
the Socratic problem in his book
The Open Society and Its Enemies (1945). ==Proposed solutions==