The Joint report acknowledges...

that in many primary sectors, an EU-Canada free trade agreement will have no discernable impact???

discernable - perceptible by the senses or intellect; "things happen in the earth and sky with no discernible cause"; "the newspaper reports no discernible progress in the negotiations"; "the skyline is easily discernible even at a distance of several miles" http://www.thefreedictionary.com/

not unless you have a money sense no!!
how does the word changes spelling when you use it in a sentence? plse elaborate...!