Both intractable and undecideable problems are hard:
	
	A. Intractable cannot be solved at all; 	Undecideable cannot be solved at all
	B. Intractable cannot be solved at all; 	Undecideable take too long to solve
	C. Intractable take too long to solve; 	Undecideable cannot be solved at all
	D. Intractable take too long to solve; 	Undecideable take too long to solve


	Both intractable and undecideable problems are characterized by broad scope:
	
	A. Intractable accept themselves as input; 	Undecideable accept themselves as input
	B. Intractable accept themselves as input; 	Undecideable look for "the best" option
	C. Intractable look for "the best" option; 	Undecideable accept themselves as input
	D. Intractable look for "the best" option; 	Undecideable look for "the best" option


	To work around an undecidable problem
	
	A. Use a heuristic
	B. Try limiting the problem space
	C. Accept a program that sometimes says "I don't know"
	D. Wait for Moore's Law to give us faster computers
	E. Give up, this can't be done
	
	
	To work around an intractable problem
	
	A. Use a heuristic
	B. Try limiting the problem space
	C. Accept a program that sometimes says "I don't know"
	D. Wait for Moore's Law to give us faster computers
	E. Give up, this can't be done