In 1935, an Austrian physicist Erwin Schrodinger proposed an experiment later known as Schrodinger’s cat or the cat paradox.
Though the experiment was about something related to science, a little insight about it can be useful in every aspects of our lyfs. Schrodinger put a cat in a box and a posion vial in the same box. Now the poison vial would explode in some point of tym. And the only way to find whether the cat remained alive or not depended on opening the box and finding it out for yourself.
Similarly, critical decisions related to friendships, relationships, money matter, travel, career changes, clothing, hairstyles etc… need to be evaluated only by opening the box and finding if the cat is still alive or not and not by hypothecated guesses!
I think this might have been the reason behind the proverb, “to get the cat out of the bag”.