Express in words the meaning of each of the following expressions (where Took(s, c) means “student s took course c”). For example, the meaning of one of these expressions is “Every student has taken at least one course.”
a. ?S ? Student (?C ? Course Took(S, C))
b. ?S ? Student (?C ? Course Took(S, C))
c. ?C ? Course (?S ? Student Took(S, C))
d. ?C ? Course (?S ? Student Took(S, C))
a. There is a student who has taken all courses.
b. Every student has taken at least one course.
c. There is a course that was taken by all students.
d. Every course was taken by at least one student.
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