Slitherlink (Entropic Liars)

     Again, a slitherlink puzzle to showcase a type of clues : Entropic Liars. For this one, I used a combination of Entropy (Sudoku) and Knapp Daneben rulesets. Here are the rules :

Normal slitherlink rules apply, but clues may be liars. In each 2x2, at least:
- One number must be 1 lower than its actual value,
- One number must be a true value,
- One number must be 1 higher than its actual value.
No clue may be off by more than 1.

Click here for an interactive version of the example. 

    Thanks to Superrabbit for testing and feedback.

Penpa+ interface