Logic: Modern Life Guide

Belangrijkste inzichten

• Every argument is premises leading to a conclusion, so find the conclusion first and then ask whether the reasons are true and enough.
• Two things appearing together is correlation, not proof of cause; ask whether the arrow could point the other way or a third factor explains both.
• In if-then messages, the then-part happening does not prove the if-part happened, so check what else could have produced the same result.
• Urgency, popularity and two-option choices are pressure, not reasons; follow the money and be wary when it flows from you to the person making the offer.
• In family disagreements, state the other person's case in its strongest form before you reply, and answer the point, never the person.

In deze bit

1. Old rules at a new speed

   Logic is the study of good reasoning: how to tell whether a set of reasons really supports the point someone wants you to accept. Its basic unit is the argument.

2. Your feed makes claims, not arguments

   Most of what scrolls past on a phone is a conclusion without its reasons, and the gap is left for you to fill. A quick three-part check helps: what exactly is being claimed, what reason is given, and where does it come from.

3. If-then thinking for remote work

   Remote work runs on written messages, and written messages run on conditionals. A conditional is an if-then statement: if the client approves the design, we print on Friday.

4. Money pressure and the logic of offers

   When money is tight, offers arrive shaped to slip past your reasoning. Three patterns turn up again and again.

5. Family arguments without the fallacies

   A fallacy is a pattern of reasoning that feels persuasive but does not support its conclusion. Family life produces three favourites.

6. Chatbots, habits and what still holds

   Chatbots and search summaries add a new wrinkle: answers now arrive fluent, tidy and confident whether or not the reasoning holds. The old tests still work.