@article {Hilbert:July 2004:0031-8116:185, author = "Hilbert, David", title = "Hallucination, Sense-Data and Direct Realism", journal = "Philosophical Studies", volume = "120", year = "July 2004", abstract = "", pages = "185-191(7)", url = "http://www.ingentaconnect.com/content/klu/phil/2004/00000120/F0030001/05143507" doi = "doi:10.1023/B:PHIL.0000033754.22719.c3" }