No. "Beyond a reasonable doubt," is the standard for the scale tip to "not guilty." Not, "a small feather of reasonable doubt."
There is always going to be a "sliver" of doubt. Nothing in life, or in perception is certain. That's why the law stipulates "reasonable doubt."
Exactly, when all is said and done in the courtroom, the jury doesn't go into the jury room stew over terms in legal books..."99% percent of this, this or that," "habeus ridiculousness" .... They read the instructions the judge gave them, and they do their best to follow them. They consider the whole of the case that was presented to them and the judge's instructions, bringing their personalities, character and life experience to bear. Then, they make a decision.