Answer:
John had 2y sandwiches
Amanda's Daughter had 2y-1 sandwiches
K1ezyMeromufah, a few of the points that are essential to know about your subject are counterarguments, rebuttals, and (spotting) logical fallacies. Here is a link to examine: http://www.csun.edu/~hcpas003/argument.html
It'd have to be a<em> bat.</em>
Bat's are blind and use sonar or echolocation to "see" where they are going. Day and night makes no difference in their abilities.
Have an amazing day :))
It would be Shakespeare <span />