"Every perception is to some degree an act of creation, and every act of memory is to some degree an act of imagination."

-- Gerald Edelman, Second Nature: Brain Science and Human Knowledge
 La figura más importante de la matemática del siglo XIX es, sin lugar a dudas, Gauss.  Necesito algo de papel. Spanish BeginnerSpanish sentence: Creo sin lugar a dudas que ella es inocente.  English sentence:  I believe, beyond a shadow of a doubt, that she is innocent.  Spanish word: sin lugar a duda English word: undoubtedly