Liar Tree Sap 100%

Wrong. At the time, we already formed speculations. Cyanne had hit the nail on the point by saying that the White scroll adds back the slot when the scroll fails.

All we lacked was screenshot confirmation. Jackk provided that for us.

Okay.
At any rate, he was testing if your speculations were correct, which they were. Before that, they were just that - speculations. If it was known and proven that white slating indeed worked that way, I doubt he would have gone to the trouble of testing it.