What if a coded message, or not coded at all, was interpreted as something that was not the case? Then is it the other legal team’s responsibility to point out

What if a coded message, or not coded at all, was interpreted as something that was not the case? Then is it the other legal team’s responsibility to point out that it’s bogus and refute the claim that it meant “I stole Jack’s peanuts”. Maybe by giving examples of other assumed ciphers that prove it actually decoded to “I can drink 5 beer cans in 2.5 minutes” or that it also means “Rabbits are actually slow” according to yet another assumed cipher? How does that work? I mean I know if it’s a jury and then it can just come down to their individual and collective whims and fancy and but how does it work in general?