Thank you, for pointing this out. :)
According to the code I have currently, the base number of Charisma you start with is 10 and if you have a charisma of 11 or lower you will not get the ride with Silas when you lie. So if you don't choose anything that gives you charisma prior to lying then you should still end up on the no ride route. I also downloaded the 0.1.2 version and just now tested it and it seems to work.
I have updated the guide with the extra Charisma point when choosing lie since I had forgotten to include it.