On service facsimiles, I haven't seen anything about the importance of the target's susceptibility to this technique. 
  If a female is to get out of having sex with an impetuous male by pleading a headache, she must accurately predict that this ploy will do it. It must key into the computations of the target. It must work, in other words.

  This brings in a possible series of questions, like: "What excuse especially impressed your mother?" (teacher / father,..)

  "Huh..I never did find any that worked with my mother. I tried to stay home one day to see how the threshing machine worked when a neighbor came to thresh the oats. But even when I argued about how educational it would be, she still made me go to school. However, when my brother got run over on his sled one day that seemed to work pretty well."

  "What excuse especially impressed your teacher?"

  "I shit my pants one day, and succeded in getting sent home, but finally gave up and became a teacher's pet parrot, smart but uninvolved."

  "What excuse especially impressed your father?" On this one I changed it to: "What got some kind of acknowledgement or recognition from your father?"

  "While we were haying, I recited the chemical formula for sugar, C12H22O11. He really noticed me when I said this and seemed to smile inside. Hey! Maybe that's why I became a biochemist!"

  Each of the above are examples of trying to optimize randomity.

  To stay home and watch a threshing machine is more interesting and active and educational than the enforced minus randomity of sitting pssively still. Getting out of school by shitting myself was positive, but did not have a long-term workability.

  Recognizing my father's approval was recognizing a possible alignment of flows, i.e., help, which he actually did give me in pursuing this field, as I was able to predict.