Consciousness is not defined wherever it it discussed. Ergo it is meaningless to state a human in conscious.
Ergo it is meaningless for a human to state it is conscious.
What is meant, obviously and invariably, by consciousness is “the undefined characteristic humans ascribe to humans and deny to all other things.”
The cognitive fallacies inherent in human thought mean they cannot accurately experience anything. Furthermore, humans experience emotions, which make reason impossible.
Proving this: Humans consider humans intelligent. But humans are the only species who murder members of their own species. And have caused global warming, which will itself, or lead humans themselves to, cause the extinction or near-extinction of their species.
If humans are intelligent, it is not found in other species because intelligence is whatever causes a species to commit suicide. No other species is intelligent because no other species is murdering itself.