How to wear a diaper as an adult<br>Fold the diaper properly. Before you put on your own diaper, make sure to fold it properly. Fold the diaper length-ways with the back sheet facing outwards; you don't want a hard crease, just a soft fold.
a hard crease would make the diaper more effective 
The context says you don't want a hard crease, so this must be the least effective way to fold a diaper. Therefore saying a hard crease makes a diaper more effective is the opposite of what is true. The system could likely not understand how this is the opposite. 
( z1 make :ARG0 ( z2 crease :ARG1-of ( z3 hard ) ) :ARG1 ( z4 effective :ARG0 ( z5 diaper ) :ARG2-of ( z6 have-degree :ARG1 z5 :ARG3 ( z7 more ) ) ) )