discussed Cited "see, e.g." Anthony Aron v. United States As we have previously stated, if the petitioner “alleges facts that, if true, would entitle him to relief, then the district court should order an evidentiary hearing and rule on the merits of his claim.” Holmes v. United States, 876 F.2d 1545, 1552 (11th Cir.1989) (quoting Slicker v. Wainwright, 809 F.2d 768, 770 (11th Cir.1987)); see also United States v. Yizar, 956 F.2d 280 , 234 (11th Cir.1992) (district court must hold an evidentiary hearing where court cannot state conclusively that the facts alleged by petitioner, taken as true, would present no ground for relief).