Answer:
true.
Explanation:
According to Hume, ideas and, more importantly, how ideas are related, depend not on things themselves, but rather, on faculties of the mind that, a posteriori, react or are activated by impressions. There is no knowledge available before impressions. For this reason, the perception of a dog as such, that is to say, the idea of a “dog” as possessing defined properties in relation to other objects, could not be perceived as such without a prior experience to found this perception; that is to say, without that prior experience, what would be perceived would certainly be “something”, perhaps an animal, a quadruped, etc., but not what is conventionally and taxonomically known as a dog.
