The Art of Logic summary

No doubt, you’ve recently had to click a box on a website to prove you’re not a robot. And while you might find this laughable or frustrating, it highlights an important difference between humans and machines. Humans have emotions, and we can’t always regulate them.

During a heated argument, we often default to emotionally-driven behavior, like yelling, making threats, or letting insults fly. This doesn’t help us win arguments or consider them from a new angle. When we can replace this behavior with a logical method of argument, we gain greater insight into the issue.

Picture yourself standing on the shore of a lake. Your home is on the other side and is only accessible by water. But you don’t have a boat – you only have a bicycle. Does this make bicycles a useless mode of transport? It’s true that logic is a method used to verify truth. But for logic to be useful, we also need to apply it thoughtfully.

To do so, context is important. If your home was at the end of a grid-locked street, a bicycle would be a great way to weave between traffic. If you need to cross a lake, though, a bicycle won’t be much use. Similarly, logic is a valuable tool in seeking truth, as long as we understand why it’s difficult to apply it in real-life situations.

Let’s start with another imagined scenario: you’re in a restaurant, and there are five main meals to choose from. One dish is outside your budget, and you’re allergic to another. That leaves you with three options, all within your budget and potentially delicious. How will you choose what to order?

Using logic, we can ask questions to narrow down options, like “How much money do I want to spend on dinner?” and “Do I want something heavy or light?” But logic alone rarely leads us to one definitive conclusion, partly because exploring every possibility thoroughly isn’t always practical or necessary. Instead, to reach a decision, we’ll combine logic with another consideration. This might be chance – you could choose your dish by tossing a coin. Or you could create another parameter, like ordering a dish you’ve never tried before instead of eating something familiar.

There’s one tiny word that drives parents with toddlers up the wall: why. Why this, why that? Every parent knows that eventually they’ll reach a point where they don’t have an answer for their child.

Similarly, logic itself has no point of origin. We can ask “why?” for an eternity and never reach a definitive starting point for truth. So, in order for logic to be useful, we have to choose a starting point, a basis we consider to be true. And that means our beliefs are our starting point.

Just think: you desperately need coffee. But as you open the fridge, you discover the milk expires tomorrow and that’s only two minutes away. How will you drink your coffee before the milk goes off?

This scenario is a bit ridiculous, but it highlights an important aspect of life. In reality, things are rarely black and white. There’s a range of gray between extremes. Humans aren’t naturally comfortable with gray areas, and, in truth, logic isn’t great at handling them either. But if we take the time to apply logic in a new way, it can guide us through murky terrain.

Think back to elementary school when you learned how to write. Everyone’s handwritten, lowercase b looked slightly different. They were all still recognized as b’s, however. But what if a classmate wrote her b backward. Is it still a b, or is it something entirely different? And how will this interfere with communication if this reversed b is used in a word?

The key message here is: To argue logically, you need to be as precise as possible.

Anger, fear, love, loyalty – these are strong emotions that can make us behave illogically, even in the face of reason. This is why feelings will always triumph over logic.

Surprisingly, though, logic and emotion aren’t mutually exclusive. And when we find the point where they cross over, we access a tool that helps us argue persuasively when logic alone has failed.