Meat companies slaughter a large number of chickens at one time [that is, simultaneously]. Now if the person running the slaughtering machine is a Muslim, who says takbír and says the name of Allãh only once at the time of slaughtering all the chicken [simultaneously], is it permissible for us to eat those chickens? If we have doubt about these chickens being halãl, can we [ignore that doubt and] eat them and consider them pure (tãhir)?