General Tips
If you follow this walkthrough to the letter, you'll miss out on a lot. Much amusement can be found by asking questions I don't tell you to ask and not skipping over anything.
You can fast-forward dialogue by repeatedly clicking the NEXT button.
If you get stuck, question everything. You'll never lose credibility by asking questions.
Not every idea that appears on the Idea Slate will come in handy during a chapter. Don't use it as a checklist.
In the options menu (click the gears), you can turn on the option to highlight questions you've already asked. This is off by default, but it's incredibly useful when you need to keep track of what you've done.
Prologue: One new York Morning...
Opponent: Billy the Salesman
Argument 1: "Buy my product!"
Ask for clarification on the first statement.
Ask for clarification on the third statement.
Press for backing on the third statement.
Argument 2: "Deer are a menace!"
Challenge the fourth statement with "Deer live in the woods".
Argument 3: "Why you still need my product!"
Question the relevance of all of the first three statements. Each one will be removed when you do.
Chapter 1: Through the Looking Glass
Opponent: Euthyphro of Athens
Argument 1: "Good is what is Holy"
Ask for clarification on the fourth statement. New idea!
Challenge the fifth statement with "There are Different Gods".
Argument 2: "On Divine Disagreements"
Press for backing on the fifth statement. A new statement will be added.
Challenge the new sixth statement with "Morality Comes from the Gods".
Chapter 2: An Old Friend Appears
Opponent: Protagoras of Athens
Argument 1: "The Source is the Self"
Ask for clarification on the fourth statement. It will be amended.
Press for backing on the newly amended fourth statement.
Argument 2: "Morality is up to the Individual"
Press for backing on the third statement. New idea!
Challenge the fourth statement with "Speech Penalty".
Argument 3: "All Morals are Subjective"
Question the relevance of the fourth statement.
Chapter 3: The Social Contract
Opponent: Thomas Hobbes
Argument 1: "The Natural State"
Challenge the third statement with "People Work Together".
Argument 2: "The Social Contract"
Ask for clarification on the third statement. It will be amended.
Challenge the newly amended third statement with "Mankind is Selfish".
Argument 3: "Our Obligation to the Contract"
Ask for clarification on the third statement. It will be amended.
Challenge the newly amended third statement with "Contracts Need to be Enforced".
Chapter 4: The Pursuit of Happiness
Opponent: John Stuart Mill
Argument 1: "Morality comes from Happiness"
Ask for clarification on the third statement. New idea!
Challenge the fourth statement with "Happiness Distribution".
Argument 2: "Rules that Promote Happiness"
Press for backing on the fourth statement. New idea!
Challenge the second statement with "Rule Nuances".
Chapter 5: Paved with Good Intentions
Opponent: Immanual Kant
Argument 1: "Intentionalism"
Ask for clarification on the fourth statement.
Argument 2: "The Categorical Imperative"
Press for backing on the second and third statements. You'll get a new idea from each one.
Challenge the fourth statement with "Lying". (You could probably have gotten somewhere with the other idea if Socrates's example was better.)
Argument 3: "The Universality Test"
Ask for clarification on the third statement. Two new statements will be added.
Challenge the new fifth statement with "Intentionalism".
Chapter 6: The End of the Road
Opponent: The Arbiter
Argument 1: "Morality Exists"
Ask for clarification on the first statement. It will be amended.
Press for backing on the newly amended first statement.
Argument 2: "The Answer Will Be Found"
Press for backing on the fourth statement.
Argument 3: "Socrates Found the Answer"
Question the relevance of the third statement. A new statement will be added.
Challenge the new fourth statement with "Mankind is Flawed".
Argument 4: "No Point in Trying"
Press for backing on the second statement. Two new statements will be added.
Ask for clarification on the new fourth statement. It will be amended.
Challenge the newly amended fourth statement with "Good is Happiness".