Interesting very well known illusion....Thanks to the Op for this stunning example of it....
Biases are conditioned and put on/in us but we can train ourself to look at the two faces of a drawing or the two alternative meanings of a sound in a short sequences...We then emerge in a larger context at another scale when we train our perception to see two images or hear the two sounds sequences alternatively in the same window......
Then instead of being the passive victim of an illusion we become active participant in the building of our world and of the objective world too...
Instead of being victim we exercise our conscious free choices through self- creative and active imagination ...
It is called learning...
And beware, be conscious of what you "imagine" because it will become real...And not only for you...
It is why in jail or in crowd they all perceive the same thing that they first imagined..Anyway it is in hell as it is in heaven... Perception may ask for a purification...
Stay free...Use your sense without being put in jail or in a crowd by them...
Looking is not seeing, and hearing is not listening; we must learn to see sound too and we must learn how to listen colors and forms...
😁😊