Complex sentence: Obviously, the greater the truth value of "cold", the higher the truth value of "high", though this does not necessarily mean that the output itself will be set to "high", since this is only one rule among many.
Split into simpler sentences: Obviously, the greater the truth value of "cold", the higher the truth value of "high". Though this does not necessarily mean that the output itself will be set to "high", it is only a rule among many.