Describir: Theories of perception and the concept of structure :

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