A cubit is estimated to have been about 18". It was 300 cubits long and 50 wide. But I'm sure you already knew that.
Well,
18" is one of about a dozen estimates for the length of a cubit. 18" is the "modern cubit", which is a convenient approximate of the median of the various possible length for the ancient cubits.
You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.
You cannot over estimate the unimportance of nearly everything. John Maxwell
