confirm一般暗指消除所有不确定的试探性的疑惑：
“We must never make experiments to confirm our ideas,but simply to control them” (Claude Bernard).
“我们不要用实验来验证我们的想法,只需操纵它们就行了” （克劳德·伯纳德）.
convince说服：通过进行辩论或者提供证据使…确信或使…采取某种行为参见It took many hours to convince the court of his guilt.
花费了许多个小时法庭才相信他有罪.