Problem: Given the question: Tom and Andy are two old friends. Tom was infected with HIV 20 years ago, and Andy has been helping him ever since. Andy is as healthy as an ox. Which friend has a weaker immune system?
++++++++++++++++++++++++++++++++
The answer is:
Tom

Problem: Given the question: Jeremy is studying the periodic table in preparation for a chemistry test next week. Today he is focusing on the elements that all belong to the alkali metals group. He is especially focused on learning about lithium, which is at the top of the group, and cesium, which is at the bottom of the alkali metals group. Which element has a smaller ionization energy?
++++++++++++++++++++++++++++++++
The answer is:
cesium

Problem: Given the question: Scientists studied two island. One with an old ecosystem named Old island, and the other with a newly formed and forming ecosystem named New island. Both islands were inhabited, Old island being heavily inhabited. Which island had a less stable ecosystem factoring in the population?
++++++++++++++++++++++++++++++++
The answer is:
Old