Final answer:
Aristotle's perspective on virtue emphasizes consistency in actions, rational decision-making, and finding joy in virtuous acts, which together signal that a virtue has been truly acquired.
Step-by-step explanation:
The signs that a person has acquired a virtue, according to Aristotle, include consistency in actions and rational decision-making. Virtue, in Aristotle's view, is not just habitual actions but also involves understanding why an action is the right choice and performing it from a firm and stable character. Therefore, habitual actions and finding joy in virtuous acts point towards the presence of virtue, as these reflect both the consistency and the pleasure found in performing good acts. It is through habituation that individuals gain practical experience and the ability to reason correctly about virtues, allowing them to consistently choose the virtuous mean between excess and deficiency.