题目内容：
Notice: This software is designed to help the user develop the ability to think critically. It was prepared for middle-school-level students, but has been used effectively with both high school students and non-university-educated adults. No attempt is made to protect intellectual property rights in it, although those rights remain the property of the author. All users are asked to send a smallest possible amount of fee, in the amount of tendollars, to the author at the address below. The author welcomes all comments and suggestions as to how thissoftware might be improved.Stephen J. MorelloBox 100
Plawsantville, New York10572 - 0100
Fax: 924 - 3245 - 4892
E-mail: laughlines @ read. com
根据以上内容，回答题。
What can this software in the notice be used to do?
To improve one's___________ critically.
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