Good question.
I have been asking this in the past few weeks in several threads, because Murlis have characters and words from scriptures which were written in the Kaliyug. And we all know that these words are symbolic and the characters such as Pandavs and places like Kurushektra did not exist during the so-called M-War. And even more recently, there are words such as emails and information technology (in the Vanis). So why does one need to have symbols to speak the truth ?
The only real answer to progress for this thread is to have all the original Murlis on public, as nothing reveals the truth more than the truth revealing itself. If it (the Murli) is the truth, that is.