Let me rephrase that. It does cease to arise but I did not mean permanently. First of all, what enlightenment means is that dukkha absolutely will never arise again. So, then the question becomes is enlightenment truly possible? I can only speak for myself, I'm not enlightened so my answer to that is that is what the Buddha taught and that is the aim of Buddhism. I do know that I suffer much less than I used to. I'm a completely different person since taking up Buddhist practice which is why I continue to do it - I want the continued benefits. I experience dukkha at least 80% less then I did 5 years ago.

The Buddha also taught about consciousness and rebirth and I do not believe in that because I have no evidence for it.

As far as is the promise of enlightenment - which is the complete eradication of dukkha - true? I have never met an enlightened person. If I do I'll let you know :)