When Penelope dismisses all of the points on the con side as invalid, without really taking the time to read and consider them, her critical thinking is affected by her close mindedness and her over-reliance on emotions.
Penelope's close mindedness occurs because she is incapable of being receptive to the ideas that the con side of the list is describing, just because her own thoughts do not agree with these ones.
She is also over-relying on her own feelings and emotions. Penelope has always loved to play video games, so when she looks at the con side of the list, she blocks them because she is following her positive feelings toward video games, rather than consider the points the list is making.