Just for fun, here are your examples applied to Commons (and a conjecture that tag systems naturally converge as they become more fine-grained): https://common

Just for fun, here are your examples applied to Commons (and a conjecture that tag systems naturally converge as they become more fine-grained): https://commons.wikimedia.org/wiki/Cat:Wikipe-tan https://commons.wikimedia.org/wiki/Cat:Wikipe-tan (NSFW-ish[0]) https://commons.wikimedia.org/wiki/Cat:Drawings_by_User:Seedfeeder https://commons.wikimedia.org/wiki/Cat:Drawings_by_User:Seed... https://commons.wikimedia.org/wiki/Cat:Demoscene https://commons.wikimedia.org/wiki/Cat:Demoscene https://commons.wikimedia.org/wiki/Cat:Paintings_of_couples,_female_sitting,_male_standing https://commons.wikimedia.org/wiki/Cat:Paintings_of_couples,... https://commons.wikimedia.org/wiki/Cat:Blue_eyes https://commons.wikimedia.org/wiki/Cat:Blue_eyes https://commons.wikimedia.org/wiki/Cat:Bow_hats https://commons.wikimedia.org/wiki/Cat:Bow_hats There's also a tool to intersect or subtract categories hidden in the dropdown of the 'Good pictures' button at the top right. [0] (NSFW-ish) https://en.wikipedia.org/wiki/Seedfeeder https://en.wikipedia.org/wiki/Seedfeeder