The Mytilenean Debate: Does a Broken Inscription Confirm Thucydides?
You are preparing an internally assessed report on the Mytilenean Debate of 427 BCE. Your teacher has supplied three extracts. Extract A is Thucydides 3.36–50, which reports the speeches of Cleon and Diodotus and says the assembly voted 'by a narrow margin' to spare the Mytileneans. Extract B is a fragmentary Athenian decree inscription (IG I³ 66) concerning Mytilene; the stone is broken where the vote count would appear, and the printed text supplies a restored numeral, [-] in brackets. The restoration was proposed by a 19th-century editor and is accepted by some historians but marked as uncertain in the corpus. Extract C is a line from Aristophanes’ Knights (produced 424 BCE) mocking Cleon’s loud rhetoric. Your report must be 600 words and must address the claim: 'The inscription independently confirms Thucydides’ account of the vote.' You have no other sources and may not use the internet.
1. Assess the claim that the inscription independently confirms Thucydides’ account of the vote.
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The claim fails at the key word 'independently'. Independent confirmation would require a second surviving witness that preserves the same detail without deriving from the first. Here the inscription does not preserve the vote count: the stone is broken and the numeral is a modern restoration. If the editor restored the number by comparison with Thucydides, the argument becomes circular. Even if the restoration is right, the inscription records the final decree, not the debate or the margin; official inscriptions usually record decisions, not divisions. Thucydides is a literary historian who reconstructs speeches and shapes the debate around demagoguery and expediency, so his 'narrow margin' may be part of his thematic emphasis. Aristophanes is comic and cannot supply a number; his value is for contemporary attitudes to Cleon's rhetoric. The most defensible conclusion is that the inscription, if read cautiously, corroborates that a decree about Mytilene was passed - something Thucydides also implies - but it does not independently confirm the closeness of the vote. A good answer distinguishes corroboration of outcome from confirmation of detail.
2. How would you use the three extracts to evaluate the significance of the debate for Athenian democracy?
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Use each source for a different job. Thucydides supplies the structure of the debate and the arguments: Cleon appeals to justice, deterrence, and the danger of clemency; Diodotus appeals to deliberation, future advantage, and the limits of punishment. That is evidence for how an educated Athenian wanted the assembly's decision-making to be understood, not a verbatim record. The inscription is evidence for the official procedure: a decree was proposed and passed, and the public record fixed the outcome. Because it is fragmentary and restored, it should be used for the fact of decision-making, not for numbers. Aristophanes shows that Cleon's style was controversial and mockable within a few years; comedy is evidence for reception and stereotype, not for the vote. Put together, the sources converge on the significance of persuasive speech and the assembly's willingness to revisit a decision. They also expose the tension between imperial expediency and clemency. The report should say where each source is strong and where it is silent, rather than blending them into a single 'true' account.