Final answer:
Without additional context or reference to Orual's character from the specific text in question, it is impossible to determine the truthfulness of Bardia's certainty about Orual's ability to kill a man.
Step-by-step explanation:
The question asks about a character named Orual and her capacity to kill a man. It appears to stem from a literary work, possibly a novel or a story, where the context of Orual's actions and personality would be crucial to determine the truthfulness of Bardia's certainty. However, without a specific text reference or more details, we cannot determine the truth of Bardia's belief in Orual's ability to commit such an act.
The provided information from various literary texts does not give us enough context to answer the question definitively about Orual. Therefore, we have to conclude that it is impossible to accurately answer whether Bardia is certain Orual will have no problem killing a man without more information.