syntax_error(+Culprit)A text has invalid syntax. The error is described by Culprit. 
According to the ISO Standard, Culprit should be an 
implementation-dependent atom.
- To be done
 - Deal with proper description of the location of the error. For short 
texts, we allow for Type(Text), meaning Text is not a valid Type. E.g. 
syntax_error(number('1a')) 
means that 1a is not a valid number.