Firstly, I want to address your point on objectivity. True objectivity, particularly regarding consciousness, is a lofty goal that we may never fully achieve. Our perceptions and understanding are inherently limited and colored by our human experiences and biological constraints. We're attempting to understand a subjective phenomenon using subjective means, which inevitably muddies the waters.
Secondly, while you've mentioned certain prerequisites for consciousness, I'm not entirely convinced these are universally applicable. I'm particularly skeptical of the notion that 'continuity of learning' is a necessary condition. Many medical conditions, such as Alzheimer's disease and anterograde amnesia (as famously experienced by patient HM), disrupt the continuity of learning. However, it would be a difficult argument to make that these individuals lack consciousness entirely. Their experience of the world may be different from the norm, but they still seem to possess self-awareness and emotions.
We must be cautious about creating restrictive parameters based on human-centric understanding to define complex phenomena such as consciousness. By doing so, we may inadvertently limit our ability to recognize these traits in diverse forms. (Cleaned up version by chatgpt, my original writing is in the response)