Establish a twitch of the thumb to mean ‘yes’ and the twitch of the second finger to mean ‘no.’
Then, ask your unconscious selfing processes any question that can be answered with a yes or a no. One of your fingers will twitch, indicating a response.
I use finger signaling frequently, and often when in the we voice.
It is especially useful because it provides the unconscious mental processes another way to communicate with the conscious self in a fashion that can be understood by the conscious self.
I learned this technique while studying self-hypnosis. It’s another technique for the toolkit.