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Exercise 4

Here's a fun challenge.  Time travel is supposed to be possible in the Harry Potter books, and some fans have suggested that Dumbledore is really a future version of Ron Weasley.  Let's evaluate that argument:

1. Evaluate this Analysis map:

Drag this image onto the workspace to proceed.  You must be using the inbuilt browser in Rationale 1.3 or later.

Hints

• Evaluate the map in this order:

• When evaluating basis boxes ask yourself: What support does this basis provide for the claim above it?
• When evaluating premises ask yourself: Is this true?
• Make sure you evaluate all the premises in a reason or objection before evaluating the reason or objection itself.
• When evaluating reasons or objections ask yourself: Given my assessment of the premises, should I accept this? Is it relevant to the claim above it?
• Finally evaluate the position: what confidence do you have in this given your assessment of the reasons and objection bearing upon it?
• Make sure you've put evaluation icons in all claim boxes, as well as coloring the body of reasons and objections

2. Check your work against the model.

Set 11 - Assessing again • Exercise 1 • Exercise 2 • Larger maps • Exercise 3 • Exercise 4 • Final

© Austhink 2007.  Rationale Exercises version 0.1, Sep-07

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