Understanding the Building Blocks

Every argument has two key parts:

• Premises: The reasons or evidence you're starting with
• Conclusion: The claim you're trying to prove

Think of it like building a case. Your premises are the foundation, and your conclusion is what you build on top.

Student Example: Deciding on a Major

Premises:

• "I enjoy solving math problems"
• "Tech jobs have good career prospects"
• "I want work-life balance"

Conclusion: "I should study Computer Science."

The Critical Point: If even one premise is false (for example, you actually hate math), your conclusion becomes shaky. The strength of your argument depends entirely on the quality of your premises.

Why This Matters in Debates

When you hear someone make a claim, immediately ask yourself: "What are their premises?" If you can show a premise is false, the entire argument collapses.

Every Claim Needs a Reason

A claim without a "because" is just an opinion. The connection between your premise and conclusion is called a warrant.

Student Example: Assignment Extension Request

Weak Request: "Can I have more time on the assignment?"

• No reason given
• Professor has no information to evaluate

Strong Request: "Can I have more time because I have three major exams this week? Here's my schedule showing the conflicts."

• Clear reason (warrant): Schedule conflict
• Evidence (backing): Actual schedule

Professional Application

In workplace discussions, always provide your reasoning explicitly. Don't assume others will connect the dots.

Example: "We should change our meeting time" becomes "We should change our meeting time because 40% of the team is in a different timezone, as shown in this survey."

Two Ways to Build Arguments

Deductive Reasoning: Certainty If your premises are true, your conclusion MUST be true.

Student Example:

• "All seniors get priority registration"
• "I am a senior"
• "Therefore, I get priority registration"

Inductive Reasoning: Probability Your premises make your conclusion likely, but not certain.

Student Example:

• "Five of my friends found internships through LinkedIn"
• "Therefore, LinkedIn will probably help me find an internship too"

When to Use Each

• Deductive: Use when dealing with rules, policies, or definitions
• Inductive: Use when predicting outcomes based on past patterns

Professional Application

Most business decisions use inductive reasoning: "Our pilot test showed 80% customer satisfaction, so a full rollout will likely succeed." Always acknowledge the probability, not certainty.

Structure vs Truth

An argument can have perfect logic but still be wrong. Here's why:

Validity = The logical structure is correct Soundness = Valid structure + True premises

Student Example

"If I study all night, I'll ace the exam. I studied all night. Therefore, I'll ace the exam."

• Valid? Yes - the logic flows correctly
• Sound? No - the premise "studying all night leads to acing exams" may be false if sleep deprivation ruins your performance

The Lesson

Don't just check if an argument follows logical rules. Check if the starting assumptions are actually true.

Professional Example

"If we cut costs, profits will increase. We're cutting costs. Therefore, profits will increase."

Valid structure, but unsound if cutting costs damages product quality and drives away customers.

The Unstated Premises

Many arguments rely on assumptions that aren't explicitly stated. Finding these assumptions is key to evaluating arguments.

How to Find Them

Ask: "What would need to be true for this conclusion to follow from these premises?"

Student Exercise

When a friend says "We shouldn't have group projects," ask yourself:

• Hidden assumption: "Individual work is more effective than collaboration"
• Hidden assumption: "Everyone dislikes group projects"

Professional Bridge

In team discussions, practice asking: "What assumption makes that claim true?"

This reveals whether everyone shares the same baseline understanding, or if there's a fundamental disagreement about the facts.

Practice Drill

Next meeting you attend, write down three claims people make. For each claim, identify one hidden assumption.