Final answer:
The conflict between Brutus and Cassius in 'The Tragedy of Julius Caesar' is evidenced by Brutus expressing disdain for corruption and Cassius responding defensively.
Step-by-step explanation:
The textual evidence from The Tragedy of Julius Caesar that supports the conclusion that Brutus and Cassius are in conflict comes from their dialogue in which they express opposing sentiments towards each other. The first strong indicator is found in Brutus's idealistic and scornful statement: "I had rather be a dog and bay the moon / Than such a Roman." This portrays his disdain for the corrupt practices he associates with Cassius. Secondly, Cassius's defensive and challenging response: "Brutus, bay not me. / I'll not endure it." clearly shows that he is in direct conflict with Brutus and does not appreciate the comparison or accusation.