1. How computers answer questions An introduction to machine learning Peter Barnum August 7, 2008

2. Searching with Google

3. Computer Experts Regression Classification Q. What is this? A. It is an apple. Q. How red is this apple? A. It is 90% red

4. Classification by Example Label Features Apple Color Shape Size Taste Dog Pear Apple Red Round Sweet Green Oval Small Sweet Brown Oval Large Bad Green Round Small Sweet ? Red Round Small Sweet ? Red Round Small Sweet ? Yellow Round Small Bad ? Yellow Round Small Bad Small

5. Artificial Neural Networks Is it red? Is it round? Is it small? Is it sweet? x 1 x -1 x 1 x -1 Sum 4 1 1 1 1 -1 -1 Predicted Answer True Answer -1 -1 1 1 1 x 1 x -1 x 1 0 2 -4 -2 -4 2

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