When it comes to conveying unwavering accuracy, "indisputable detail" is a powerful phrase. However, there are other phrases that can be used interchangeably. "Irrefutable evidence" is one option, implying that there is no way to argue against the accuracy of the detail. "Undebatable fact" is another strong phrase, emphasizing that this particular detail is simply not up for debate. "Unquestionable truth" conveys a similar idea, suggesting that the detail is true beyond any doubt. No matter which phrase is chosen, the message is the same: this particular detail is not open to interpretation or dispute.