Implying optical illusions

BUR #43678 has been rejected.

create implication fluttering_heart_illusion -> optical_illusion
create implication forced_perspective -> optical_illusion
create implication primrose_field_illusion -> optical_illusion

all of these are by definition optical illusions so i think it makes sense to make an implication.

impossible objects have been purposefully omitted due to the fact that they can sometimes be used as symbols, for instance, the penrose triangle is used as an insignia on uniforms in Signalis. tagging those posts as optical illusions feels like missing the point of the tag to an extent.

i'd still like there to be some kind of umbrella tag for impossible objects, but i'll wait and see how this bur pans out before trying that.

Forced perspective is an optical illusion but it doesn't really feel like the sort of thing that I would want to see in that tag unlike the other two.

This bulk update request is pending automatic rejection in 5 days.

This bulk update request has been rejected because it was not approved within 45 days.

The bulk update request #43678 (forum #368228) has been rejected by @DanbooruBot.