How to Build Better Arguments
Good critical thinking (covered in Part 1) requires raw material to work with — and that raw material is arguments. Not arguments in the sense of quarrels, but in the philosophical sense: structured reasoning that moves from premises to conclusions.
Understanding what makes an argument sound is the practical companion to knowing how to evaluate one.
What is an argument, exactly?
An argument is a set of statements in which some (the premises) are offered as reasons to believe another (the conclusion). Arguments are not merely opinions — they have structure. The premises either do or do not support the conclusion, and that relationship can be examined.
A valid argument is one where, if the premises are true, the conclusion must be true. A sound argument is valid AND has true premises. Soundness is what you’re after.
Most real-world arguments are neither purely valid nor purely deductive. They’re inductive — they offer probable support, not guaranteed support. A good inductive argument makes the conclusion likely given the premises, even if not certain.
What makes an argument weak?
Most argument failures fall into recognizable patterns:
False premises — the argument is valid, but one of its premises is wrong. This is common and easy to miss if you agree with the conclusion.
Non sequitur — the conclusion doesn’t follow from the premises, even if the premises are true. The reasoning is broken regardless of what the facts are.
Equivocation — a key term shifts meaning between premises, making the argument look valid when it isn’t. “Laws of nature are laws. Laws require a lawgiver. Therefore nature has a lawgiver.” The word “laws” is doing two very different jobs here.
Circular reasoning — the conclusion is secretly one of the premises. The argument assumes what it’s trying to prove.
Learning to spot these patterns doesn’t require a logic degree — it requires slow reading and a willingness to ask: “does this actually follow?”
How do you build a stronger argument?
Three practices that consistently improve argument quality:
Start with the strongest version of the opposing view. If you can’t articulate the best case against your position, you don’t understand the debate well enough to argue your side convincingly. This is steelmanning — the opposite of strawmanning.
Distinguish empirical from normative claims. Empirical claims are about what is true. Normative claims are about what should be. Many arguments fail because the two are mixed without acknowledgment. “This policy causes X” is empirical. “X is bad” is normative. Both need support, but different kinds.
Make your premises explicit. Hidden premises are where arguments go wrong. Write out every step. If you’re not willing to defend a premise, you shouldn’t use it.
A well-built argument is testable — it tells you exactly where to look if you want to challenge it.