And it is imagined by many that the operations of the common mind can by no means be compared with these processes, and that they have to be required by a sort of special training.

【正确答案】

【答案解析】许多人认为，普通人的思维活动根本无法与科学家的思维活动相比，这些思维活动必须经过某种专门训练才能掌握。