Agnostic: a pointless term?

[Dystopia]

I'm not so sure of that. Before human flight, lift wasn't defined, yet the birds made use of it daily.

I sometimes cannot define my own emotions, yet I know that they are present.

This is not a very good analogy - When we talk about the god hypothesis, we see that there are billions of people around the world during a period of thousands of years that claim deities exist - Yet there is not one precise definition of what a deity is supposed to be; it varies according to each religion, each theological position, each personal individual belief - Let's pick the example of Christians - Some of them may have a different concept of how god works or how god behaves or acts. My point is that if the god concept isn't even defined, I could as well dismiss it from the beginning under the form of a knowledge claim by saying something that is not defined cannot exist.

Your emotions may be hard to define, but since you can feel them and it's possible to scientifically measure, account, quantify and verify emotions - You know they exist, regardless of your ability to sometimes determine with reasonable certainty what precise emotions you are feeling. [It's not possible to physically get a sample of emotions, don't get me wrong, but it is possible to observe body reactions and psychological responses humans have - For example, when you start shaking in front of eminent danger, that's an emotion - Fear; and it's verifiable trough observation of your individual behaviour]