For example, in this picture the moon appears to be small, local, for its light is concentrated in a small area, but then approximately half the world can see it at any given time, so what're we to believe?
MS science claims the former effect is illusory (moon/sunlight concentrated in a small area), and the latter effect is not (moon/sunlight appearing to approximately half the world at any given time), but what if it's both, what if the moon/sun is both small, local, and big, 'global' (for lack of a better word), in different ways?
Here again, the sun sets, and its light appears concentrated in a small area.
" class="bbc_link" target="_blank" rel="noopener noreferrer">Now you could come up with some elaborate explanation for why it is other than it appears to be, but if we're to just go with our eyes, than it's both a and b.