103  is more nuanced by requiring that prior art falls into an analogous art category.
a.    Idea is prior art should be based on standard of person skilled in the art.
b.    Ex. Popcorn funnel for oil is in different art area than popcorn.
c.    Includes prior art relevant to the problem you are trying to solve.
(A)    Ex. Heat dissipation of light bulb, both lighting and heat dissipation are relevant categories of art.
(B)    Ex. Latches on laptop. 103 category: other portable computers and other latch references.