ance , ▁the ▁correct ▁decision ▁is ▁almost ▁certainly ▁to ▁fol d . ▁There ▁are ▁too ▁many ▁turn ▁and ▁river ▁cards ▁that ▁could ▁kill ▁his ▁hand . ▁Even ▁if ▁Carol ▁does ▁not ▁have ▁an ▁A ▁or ▁a ▁K , ▁there ▁are ▁ 3 ▁cards ▁to ▁a ▁straight ▁and ▁ 2 ▁cards ▁to ▁a ▁flush ▁on ▁the ▁f lop , ▁and ▁she ▁could ▁easily ▁be ▁on ▁a ▁straight ▁or ▁flush ▁draw . ▁Bob ▁is ▁essentially ▁drawing ▁to ▁ 2 ▁out s ▁( another ▁ 9 ), ▁and ▁even ▁if ▁he ▁catch es ▁one ▁of ▁these ▁out s , ▁his ▁set ▁may ▁not ▁hold ▁up . ▁ ▁However , ▁suppose ▁Bob ▁knew ▁( with ▁ 1 0 0 % ▁certain ty ) ▁that ▁Carol ▁held ▁ 8 ♦ ▁ 7 ♦ . ▁In ▁this ▁case , ▁it ▁would ▁be ▁correct ▁to ▁raise . ▁Even ▁though ▁Carol ▁would ▁still ▁be ▁getting ▁the ▁correct ▁pot ▁odd s ▁to ▁call , ▁the ▁best ▁decision ▁for ▁Bob ▁is ▁to ▁raise . ▁Therefore , ▁by ▁fol ding ▁( or ▁even ▁calling ), ▁Bob ▁has ▁played ▁his ▁hand ▁differently ▁from ▁the ▁way ▁he ▁would ▁have ▁played ▁it ▁if ▁he ▁could ▁see ▁his ▁oppon ent ' s ▁cards , ▁and ▁so ▁by ▁the ▁fundamental ▁theorem ▁of ▁pok er , ▁his ▁oppon ent ▁has ▁gained . ▁Bob ▁has ▁made ▁a ▁" m ist ake ", ▁in ▁the ▁sense ▁that ▁he ▁has ▁played ▁differently ▁from ▁the ▁way ▁he ▁would ▁have ▁played ▁if ▁he ▁knew ▁Carol ▁held ▁ 8 ♦ ▁ 7 ♦ , ▁even ▁though