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# w3 - Math 55 Worksheet Adapted from worksheets by Rob Bayer...

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Math 55 Worksheet Adapted from worksheets by Rob Bayer, Summer 2009. Instructions Introduce yourselves! Despite popular belief, math is in fact a team sport! Decide who will be your Frst scribe. Do the problems below, having a di±erent person be the scribe for each one. Try to work out the problems as a group, but feel free to ²ag me down if you run into a wall. Rules of inference (Quick Review. Don’t spend too long on these!) 1. Determine what conclusions, if any, you can draw from each of the following sets of premises: (a) “All athletes watch professional sports,” “Alice is an athelete.” (b) “All athletes watch professional sports,” “Bob watches professional sports.” (c) “All athletes watch professional sports,” “Everyone who watches sports likes pizza,” “Charlie doesn’t like pizza.” (d) “All athletes watch sports,” “Dan isn’t an athelete.” 2. What’s wrong with each of the following arguments? (a) Every CS major takes discrete math. Alice is taking discrete math. Therefore, Alice is a CS major.
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