Exciting times. The philosophical ramifications of the syntax/semantics distinction is not something people think much about in the main. However, due to GPT et al they will do soon :)
More to the point, consistency will improve accuracy in so far as inconsistency is sometimes the cause for inaccuracy. However, being consistent is an extremely low bar. On a basic level even consistency is a problem in natural language where so much depends on usage -- it is near impossible to determine whether sentences are actually negations of each other in the majority of possible cases. But the real problem is truth assignment to valid sentences else we could all just speak Lojban and be done with untruth forever.
More to the point, consistency will improve accuracy in so far as inconsistency is sometimes the cause for inaccuracy. However, being consistent is an extremely low bar. On a basic level even consistency is a problem in natural language where so much depends on usage -- it is near impossible to determine whether sentences are actually negations of each other in the majority of possible cases. But the real problem is truth assignment to valid sentences else we could all just speak Lojban and be done with untruth forever.