Describir: Theories of perception and the concept of structure :

  ____       ___      _  _      ___                ______    ______   _    _   
 |  _ \\    / _ \\   | \| ||   / _ \\    ____     /_   _//  /_   _// | || | || 
 | |_| ||  / //\ \\  |  ' ||  / //\ \\  |    \\    -| ||-   `-| |,-  | || | || 
 | .  //  |  ___  || | .  || |  ___  || | [] ||    _| ||_     | ||   | \\_/ || 
 |_|\_\\  |_||  |_|| |_|\_|| |_||  |_|| |  __//   /_____//    |_||    \____//  
 `-` --`  `-`   `-`  `-` -`  `-`   `-`  |_|`-`    `-----`     `-`'     `---`   
                                        `-`