On its own yes, but if combined with the previous statement that a pen would float away, it just exhibits a piecemeal and inconsistent understanding of physics.
Oh god. Feathers and dust don't float away because they're weightless.
They float away because air currents exert forces on them that are greater than their weight. Eventually, in a still-air environment, the feather and the dust will settle to the ground. You can verify this by going to your nearest attic.
