In chapter 1 of Caro’s Book of Poker Tales, Mike Caro introduces the idea that poker players are far less mechanically predictable than most people assume, and that this unpredictability is the foundation for understanding poker tells.
The Law of “Loose Wiring”
Caro presents a psychological principle he calls Loose Wiring, which says that human decisions are not tightly linked to outcomes. Even when people know what the “right” move is, they may still act differently from one moment to the next. Emotions, impulses, distractions, and uncertainty all interfere with perfectly logical behavior.
In poker, this means players do not function like computers. Their choices are often influenced by mood, confidence, fear, and fleeting instincts.
Two Identical Hands, Two Different Results
To prove this, Caro describes two poker hands that were, in every meaningful way, exactly the same:
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Same players
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Same cards
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Same board cards
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Same game conditions
Yet the results were dramatically different. One hand grew into a huge pot with multiple players and raises, while the other stayed small and ended quickly. The winners were different, and so were the betting patterns.
This shows that even with identical cards and situations, human decisions can go in completely different directions.
Why This Happens
Caro explains that most poker decisions are not clear-cut. Only a small percentage of hands are obviously strong or weak. Most fall into a gray area where players are unsure what the best move is. In those moments:
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Players hesitate
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They rely on instinct
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They are easily swayed by small emotional or social cues
As a result, many poker actions are decided at the last second rather than by a fixed plan.
Whim Is Not Always Bad
Caro emphasizes that acting on impulse is not necessarily a mistake. In fact, this kind of randomness can make players harder to read and can even line up with sound game theory by preventing opponents from predicting patterns too easily.
Even skilled players sometimes decide whether to play a hand or fold based on a momentary feeling rather than calculation alone.
What This Means for Tells
Because players are so mentally “loosely wired,” they are constantly giving off signals about:
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Confidence
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Uncertainty
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Excitement
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Fear
These emotional states influence their choices, especially when they are undecided. That is why tells exist: players reveal their internal struggle through behavior.
Turning Opponents’ Whims Into an Advantage
Caro’s key takeaway is that your job is to influence those fragile, borderline decisions. Since opponents are often on the fence, even small things—your words, your posture, your speed of action—can push them toward folding, calling, or raising.
By understanding Loose Wiring, you stop treating poker like a rigid strategy game and start seeing it as a dynamic psychological contest where human unpredictability can be exploited.
The Link to Poker Tells
The chapter closes by tying Loose Wiring directly to tells. Since players are constantly battling indecision, their behavior becomes a live window into their thinking. To win more, you must not only analyze what they do, but also observe how and why they do it.