Needs in Hellenistic and Enlightenment Materialism

It is not difficult to see that the concept of true and false needs is quite closely related to the question of true and false pleasures that Plato posed in the Philebus . Both questions seem fraught with the same difficulty: neither needs nor pleasure are judgements on things and how, therefore, can they be true or false? Either I have or do not have a need, or I feel or do not feel pleasure. If I have a need or feel pleasure, these experiences are in a sense self-authenticating and it is only really if I think I have a need but do not have it, or think I feel pleasure but do not feel it that these are usually understood as false or mistaken judgements. Would it not, therefore, be truer to say that there are genuine as opposed to mistaken needs, real as opposed to ephemeral pleasures?