Is a prosecutor entitled to comment on a defense counsel's argument that their client's testimony is flawed?

3 The government argues that such a statement is proper under the "invited reply" rule that a prosecutor may respond to a defense counsel's attack in order to "right the scale," citing United States v. Parker, 991 F.2d 1493, 1498 (9th Cir.), cert. denied, 510 U.S. 839 (1993). Righting the scale in this case, however, would allow the prosecutor to comment on the fact that defense counsel's argument was not based on the evidence; it would not invite a response that defense counsel had no faith in his client's testimony.