▁opinion ▁Much ▁of ▁the ▁initial ▁comment ary ▁about ▁the ▁case ▁focused ▁on ▁Justice ▁Kennedy ' s ▁conc urr ing ▁opinion . ▁Writing ▁for ▁the ▁Los ▁Angeles ▁Times , ▁David ▁G . ▁Sav age ▁described ▁Justice ▁Kennedy ' s ▁opinion ▁as ▁" un us ual " ▁and ▁" a ▁rare ▁instance ▁of ▁a ▁Supreme ▁Court ▁justice ▁virt ually ▁inv iting ▁a ▁constitution al ▁challenge ▁to ▁a ▁prison ▁policy ". ▁Mart y ▁Led erman ▁described ▁Justice ▁Kennedy ' s ▁conc urr ing ▁opinion ▁as ▁" the ▁single ▁most ▁surprising ▁and ▁heart ening ▁development ▁of ▁the ▁term ". ▁Matt ▁Ford ▁wrote ▁that ▁" K enn edy ’ s ▁critique ▁of ▁solit ary ▁conf in ement ▁in ▁Davis ▁came ▁without ▁warning ▁or ▁fan fare " ▁and ▁that ▁"[ s ] olit ary ▁conf in ement ▁is ▁a ▁new ▁battle ground ▁for ▁the ▁Court ’ s ▁second - long est ▁serving ▁justice , ▁but ▁not ▁a ▁surprising ▁one ". ▁ ▁Although ▁he ▁suggested ▁Justice ▁Kennedy ' s ▁conc urrence ▁may ▁be ▁" more ▁consequ ential " ▁than ▁Justice ▁Harry ▁Black mun ' s ▁diss ent ▁in ▁Call ins ▁v . ▁Collins , ▁Mark ▁Joseph ▁Stern ▁described ▁Justice ▁Kennedy ' s ▁conc urrence ▁as ▁" my op ic ", ▁not ing ▁that ▁" large ▁ch unks ▁of ▁the ▁' legal ▁a cademy ' ▁in ▁the ▁' public ' ▁were ▁aware — and ▁out rag ed — by ▁the ▁practice ▁long ▁before ▁Kennedy ▁condem ned ▁it ". ▁D ah lia ▁Lith wick ▁wrote ▁that ▁even ▁though ▁" K enn edy