How do you determine whether a triple from a query result has been inferred?

[Simon Gray]

I would like to display inferred triples differently in my UI, but I’m unsure 
how to programmatically ascertain which triple is from inference and which is 
raw data. The only way I can think of that might work would be to make a 
secondary look-up in the raw data graph and compare the difference of the 
result sets, but I thought maybe there is a utility method or some kind of 
attached metadata I could use on the individual triple instead.