I understand what some of you mean by a feeling or knowing that makes you lucid, with out anything appearing out of place or doing an RC. I may argue though that the very clear difference between being awake and in a dream, is an anomily that is noticed causing lucidity. In that sense it is not a spontaneous LD. True you did not see your cat become a rabbit, and you did not pass you hands through each other, but something was different and you became aware of it,,, became lucid because of it.

I do completely understand that awareness training does not relie on spotting obvious oddities. It often is just that your awareness is now so keen, that it becomes a bit obvious that a dream is a dream.