can this algorithm have same number[i] values or t[i] value even after having while(choosing[j]) condition below if yes then what is use of this condition when i researched i found that it can theoretically have same values but not practically can anyone explain why choosing=true/false is done here then?

I tried to research about this from different sites but unable to understand because when i tried to preempt processes to test algorithm after calculating pmax the number[i] was coming same irrespective of choosing=true/false variable.