My point is “summarizing over all of those” and “poisoning”.

Source of category 1 says cheese is made from XYZ and yellow

Source from category 2 confirms 1 in different words and adds that it has holes

Source from category 3 confirms 2 and adds that its blue, not yellow

Source 4 talks about blue cheese only

Poisoning would mean that in the summary cheese is yellow with blue holes.