So even if said life form isn't capable of thought it still qualifies?
Well then somewhere in our universe - most likely not in our solar system - there is a good chance there's an organism of some sought without a brain or equivalent organ.
You do realize that because all life on earth has evolved from an single organism we are related to anything with a cellular structure. So we humans, some few billion years ago, shared an ancestor with fungi. Now see how different fungi is from us humans, imagine what a non-related organism would look like.
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