
1-2. In trial 2, there is an enunciative location between disk 2 and disk 1;
disk 2 is located to disk 1, with attentional centration on disk 1 and disk
2 is put in the background. But thinking of disk 1 involved disk 2. The
function of the modal verb is to make a link between enunciative level and
the situational one : thinking of disk 1 invoves disk2 at enunciative level.
But the selected disk 2 involves the solid disk 2 which itself involves its
move at situational level and therefore the move of disk 1