Does a failure to investigate thoroughly result in inattention?

Any "failure to investigate thoroughly" here resulted not "from inattention," but from thwarted attempts. See Wiggins , 539 U.S. at 526, 123 S.Ct. 2527. Attorneys are expected to formulate reasonable strategies that "balance limited resources in accord with effective trial tactics and strategies." Richter , 562 U.S. at 107, 131 S.Ct. 770. Thus when they hit dead ends like this, they may abandon those inquiries, especially if they determine they are "distractive from more important duties." Id. (quoting Bobby v. Van Hook , 558 U.S. 4, 11, 130 S.Ct. 13, 175 L.Ed.2d 255 (2009) (per curiam)).