The definition I use is very similar. I like to think of consciousness or sentience as the ability to model (or predict) one's self. A pattern-matching entity

The definition I use is very similar. I like to think of consciousness or sentience as the ability to model (or predict) one's self. A pattern-matching entity that can match its own patterns. I might disagree about the intelligence aspect. It seems to me any entity that is at least moderately interesting (has any kind of behavioral complexity) would need some level of intelligence in order to model itself to a respectable degree.