It would be necessary to know beforehand that Aquarius is among the coolest and perhaps cruelest signs we have.
Aquarius has very little emotion to express, in contrast to those who might put on a poker mask to hide their feelings. They can easily suppress any urge to retaliate. Cold, difficult to discern, aloof, and unfriendly describe Aquarius.
Considering how professionally cool Capricorns are, you'll never be able to understand them. Capricorn thrives in a world made of brass tacks and solid, unemotional concepts because they dislike strong displays of emotion.
This kind of task cannot be completed with emotions flying all over the place; it requires concentration and almost military precision. Capricorn uses its inability to read to its benefit because of this.
Gemini is the sign that is best at keeping everything on their thoughts hidden among the other signs. No matter what is happening, you will never be able to interpret your Gemini friend's facial expression.
They keep all of their knowledge inside, consider and balance what they need to know, and never display any emotion, not even when they fell in love. Gemini is the likely winner of this poker encounter.
Let's just put it this way: Libra had you fooled right from the beginning. They ride on that "nice guy" reputation until you ask them something personal.
Libra does not like to give personal information out, and to avoid confrontation (Libra's deathly fear) they will show you a coldness so intense, you'll wonder if they are even human. The "nice guy" that is Libra is a fake, making them impossible to read.