Linguistics; ET languages; your comments...

The first batch of your comments on my ET phonology question that I want to tackle is the batch that doesn't try to answer my question. I don't know whether it's because I didn't make myself clear, or because the question was perhaps read too quickly, or because the commenters just preferred not to color inside the lines. In any case...

My question was narrow and specific:
Suppose the ET language we're dealing with has three classes of meaningful sounds: vowels; consonants; and something else...