Its not that simply to vote lucid/not lucid on this one… let me rather explain.
This is long ago, when I started LDing, before I could ‘feel’ a dream.
I would normally become suspicious, but not yet lucid. Then I would check if its a dream - but if the check fails, I stay non-lucid.
So… its neither lucid or not lucid, its that unsure stage in between.
Nowadays things are a bit different and that unsure stage is either short, or non-existent. Mainly cos I can feel that its a dream somehow, so theres no doubt.