 An influential view about phenomenal concepts which answers the knowledge argument admitting that Mary gains new knowledge but no knowledge of new facts is developed in Loar (1990/1997): Phenomenal concepts are recognitional concepts. To have the phenomenal concept of blueness is to be able to recognize experiences of blueness while having them. The recognitional concept of blueness refers directly to its referent (the physical property of blueness) where this means (in Loar’s terminology): there is no other property (no property of that property) involved in the reference fixing.  According to Loar’s view the recognitional concept of phenomenal blueness refers to the physical property phenomenal blueness in virtue of being ‘triggered’ by that property. It has been doubted that ‘directness’ in Loar’s sense provides an account for what one might call acquaintance: for the way in which the phenomenal character is present to the mind when a thinker employs phenomenal concepts (see Levine 2007). White (2007) argues against Loar that the account cannot explain the a posteriori character of mind-brain identity statements in a satisfying manner.