One of the biggest reasons for investigating truth tables is for finding statements that are universally valid. Let's begin with the truth table of something a little simpler. Let's write out this truth table. Trust me when I say the truth table for modus ponens would take a little more room. True in every world.
Someone ought to be able to write a poem that catches that sense of awe.
An insightful poet might realize how many assumptions are smuggled into our discussion of truth tables. By restricting ourselves to statements that take on truth values, we eliminate almost everything that is interesting about our language. A man who only considered logic would live in a very sterile world indeed. That's all I've got to say about truth tables for now.