Our knowledge of physics is uncertain, but it is not inaccurate. Perhaps absolute truth is unattainable, but we can achieve enough truth that it becomes practic

Our knowledge of physics is uncertain, but it is not inaccurate. Perhaps absolute truth is unattainable, but we can achieve enough truth that it becomes practically equivalent to absolute truth. I haven't read any of Rand's arguments, so it is difficult for me to understand the context, but dismissing an argument on the basis of absolute truth not existing seems a little too convenient.