"If" versus "and" in statements
Let I(x) be the statement “x has an Internet connection”and C(x, y) be the statement “x and y have chatted over the Internet ”, where the universe of discourse for the variables x and y consists of all the students in your class. Use quantifiers to express each of these statements.
1. There is a student in your class who has chatted with everyone in your class over the Internet. Answer is:
2. There are at least two students in your class who have not chatted with the same person in your class. Answer is:
I am confused about whether I should use "if" or "and". In the first question, "if" is used. In the second question "and" is used. But I would use "and" in the first statement.