Life is full of logical arguments. Logical arguments are simple chains of statements people make to explain something they believe or notice about themselves, other people or the world at large. For example: "I love to hike, except when it rains, so I had a great hike last weekend." "Practice makes perfect. If my sister practices the piano, she will become a concert pianist." "I feel sick. I should not have eaten the whole pizza."
People normally respond to such arguments with a reassuring nod or smile. Not lawyers. Lawyers say things like: "Do you still like hiking if it snows but does not rain?" "Does everyone who practices become a concert pianist?" "How do you know it was the pizza?" Lawyers love to pick apart arguments to see how they work the way engineers deconstruct machines and football coaches analyze plays. This is the ability tested by the logical reasoning section on the LSAT.