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# Boolean Logic: how to talk to search engines in their own language

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You think in words. The search engine thinks in math. How can you communicate? BOOLEAN! Use Boolean logic to REALLY tell a search engine what you want to know! This presentation will show you how to use AND, OR, and AND and OR in combination.

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### Boolean Logic: how to talk to search engines in their own language

1. 1. Booleanand what it can do for you!
2. 2. GeorgeBoole•He is a rock star•He did math like Michael did “Thriller”•He invented Boolean LogicThis is
3. 3. BOOLEAN LOGICis a system that combines terms using AND and OR.Boolean lets you tell a searchengine what you want to know!
4. 4. How you think How a search engine thinksGeorge Boole, afamousmathematician, was also a greatanimal lover. Doyou think he hadany pets?
5. 5. If the search enginewere a person, thiswould be an easyproblem – it justspeaks a differentlanguage!How a search engine thinks
6. 6. Boolean is how you translatebetween your English and thesearch engine’s super-logicalcomputer language!Luckily, you only need toknow two easy words.
7. 7. ANDProduces only results that include all keywords and conditions.
8. 8. EVERYTHINGABOUTCATSTHIS is everything on the entireInternet that includes the word CATS.
9. 9. EVERYTHINGABOUTBOOLETHIS is everything on the entire Internet thatmentions the word BOOLE.
10. 10. EVERYTHINGABOUTCATSEVERYTHINGABOUTBOOLEHere they are together. Everything CATS and everythingBOOLE.Notice the rather sizeable overlap.Sometimes CATS and BOOLE occur together.HMMMMM.
11. 11. ONLYstuff aboutCATSANDBOOLEEVERYTHINGABOUTCATSEVERYTHINGABOUTBOOLEWe know that information about Boole’s pet catsmust include both the word “Boole” and the word“cats.”Therefore, the information we want must belocated somewhere in that overlap!
12. 12. ONLYstuff aboutCATSANDBOOLEBy using AND, we have told the search engine toeliminate any results that do not include BOTHkeywords.Now we have a good chance of finding theinformation we want!
13. 13. ORProduces results that include every keyword and condition.