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# PART 2c : Decisions under ignorance:

**PART 2c**: **Decisions under ignorance: optimism-pessimism rule**

**(1) **Following the discussion of the **optimism-pessimism rule** on pages 32 - 35, **provide the a-indexes** for all acts in tables 2-23 and 2-24 on page 34 (let a = ½).

Hint: your answer should include 2 diagrams with 2 a-indexes for each diagram.

**(2)** Using the same tables 2-23 and 2-24, **state which acts** the rule picks out when a = ¾ and when a = ¼. Explain why the rule picks out different acts when the value of 'a' changes and explain why **ordinal transformations **do not preserve consistency?

Hint: your answer should include 4 diagrams (2 diagrams for set of values for 'a') and 2 a-indexes for each of the 4 diagrams (8 in total).