In linear crypt analysis, partial sub keys are guessed and verified for its correctness with the help of plaintext and ciphertext.
From the partial sub key, how it is possible to guess the complete key?
For example, if we are guessing and verifying the key bits $K_5,K_6,\ldots,K_8,K_{13},\ldots,K_{16}$ for its correctness. But how can we get the complete key? That is $K_0, \ldots, K_{16}$.