Suppose that some knowledge base contains various propositional-logic sentences that utilize symbols a, b, c, d (connected with various connectives). there are only two cases when the knowledge base is false:
- first case: when a is true, b is true, c is true, d is true.
- second case: when a is true, b is false, c is true, d is false.
in all other cases, the knowledge base is true. write a conjunctive normal form (cnf) for the knowledge base.

Write an application that allows a user to enter the names and birthdates of up to 10 friends. continue to prompt the user for names and birthdates until the user enters the sentinel value “zzz” for a name or has entered 10 names, whichever comes first. when the user is finished entering names, produce a count of how many names were entered, and then display the names. in a loop, continuously ask the user to type one of the names and display the corresponding birthdate or an error message if the name has not been previously entered. the loop continues until the user enters “zzz” for a name. save the application as birthdayreminder. java.

Which one of the following would administrators use to connect to a remote server securely for administration? a. telnetb. secure file transfer protocol (sftp)c. secure copy (scp)d. secure shell (ssh)

Rachel completed typing an official document with a word processing program. she wants to make sure that her document has no typographical errors. she also wants all headings to have the same font. which features in a word processing program should she use? rachel should use the feature in a word processing program to find typographical errors. she should apply to have uniform headings.