What did you already know of the material pesented in the lesson?

Since we are still on Boolean logic, everything I learned today was new. The fact that there are default boolean operators was definately new. I did not know that search engines add either "and" or "or" when more then one word is entered into the search box. The fact that most search engines use "and" though makes a lot of sense, when doing research I have realized that the majority of the time the results have both words i entered but in rare cases they do not and I realize that those search engines have "or" as their default boolean operator.