 to be taken in consideration with the
double denomination of the peg; example in 22 with 'on the green disk on b'.
This last criteria (double denomination) can be considered as hierarchically
higher than the single change of denomination.
N.B. demarcation of episods are not in phase at situational level and at
enunciative one. Only the demarcation at enunciative level seems to worked.
The demarcation at situational level is cognitively blocked; but at the same
time it establish an automatic control.

N.B. 