Problem: If the whatsis is so when the whosis is is and the so and so is is-so, what is the whosis-whatsis when the whosis is so, the so and so is so-so, and the is is two (whatsis, whosis, is and so are variables taking positive values)?
Answer Choices:
A. whosis-is-so
B. whosis
C. is
D. so
E. so and so
Solution:
Let and denote whatsis, whosis, is and so, respectively. Then and imply , or equivalently, since implies . Now if and , or equivalently , then , so that .