It is not, as is commonly supposed, an essential characteristic of a concept that it should contain much under it, that is to say, that many ideas of perception, or it may be other abstract ideas, should stand to it in the relation of its ground of knowledge, i.e., be thought through it. This is merely a derived and secondary characteristic, and, as a matter of fact, does not always exist, though it must always exist potentially.
d. beraren bitartez pentsatua izatea, hori ez da, sarritan adierazten denez, gaitasun esentzial bat, baizik eta deduzitu, sekundario bat, zeina ez baita beti errealitatean gertatzen, nahiz eta beti ahaltasunaren arabera existitzen den. Gaitasun hori kontzeptua errepresentazio baten errepresentazio izatetik dator, h. d.