A "model" for a set of formulas is . . .  Select one: a. an interpretation on which all of the formulas in the set have a determinate truth value. b. a structure showing how the formulas can be false. c. a structure showing how the formulas relate to each other. d. an interpretation on which some of the formulas are true. e. an interpretation on which all the formulas are true.

Philosophical Logic

ii. Let F(x,y) be the open sentence "x can fool y" where the domain of discourse is the set of all people in the world. Express each of these statements using logical quantifiers. c. Everybody can fool somebody. e. Everyone can be fooled by somebody. f. There is somebody who can be fooled by everybody.

Determine which, if any, of the three given statements are equivalent. a. It is not true that I do not practice regularly and I can play well. b. I do not practice regularly and I can play well. c. I practice regularly or I cannot play well. O a and b O none Oa and c Ob and c