Title: Opcional

Text: 7. You can be sure of succeeding in your attacks if you only attack places which are undefended. You can ensure the safety of your defense if you only hold posi- tions that cannot be attacked. 8. Hence that general is skillful in attack whose oppo- nent does not know what to defend; and he is skillful in defense whose opponent does not know what to attack. Cada párrafo será una prueba.

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