1. A fingers Crossed emoji which displays the index (first) finger Crossed over the middle (second) finger

2. They had long slender arms and hands, with immobile forearm bones and limited opposability between the first finger and the other two.

3. The first finger is used in finger and toe counting and then the second is used, until to the twentieth. It always is me as dominator who counts.

4. It probably served as a sort of landing flap when it was stretched out caudally, thus improving the flight properties of the wing, all the more as the alula of the first finger was lacking.