The purely psychological problems which it raises are not very difficult, though they have sometimes been rendered artificially obscure by unwillingness to admit the fallibility of the non-sensational elements of perception.
它提出的纯心理问题并不十分困难, 尽管有时由于不愿承认非耸人听闻的感知因素的误性而人为地使这些问题变得模糊不清。