Describir: Theories of perception and the concept of structure :

  _____    __   __    _____    _    _     ______   _    _      _____  
 /  ___||  \ \\/ //  / ____|| | || | ||  /_   _// | || | ||   / ___// 
| // __     \ ` //  / //---`' | || | ||    | ||   | || | ||   \___ \\ 
| \\_\ ||    | ||   \ \\___   | \\_/ ||   _| ||   | \\_/ ||   /    // 
 \____//     |_||    \_____||  \____//   /__//     \____//   /____//  
  `---`      `-`'     `----`    `---`    `--`       `---`   `-----`   
                                                                      
 __   __  
 \ \\/ // 
  \ ` //  
   | ||   
   |_||   
   `-`'