... Reaper paradox. The patterns of argumentation we see with the grim reaper will recur in other similar paradoxes. A grim reaper is a machine with an alarm. In this version of the paradox, they light lamps. When a grim reaper's alarm goes off, it activates, checks to see if the target lamp is on, and if so...

... with other objects, and I don’t yet have any evidence relevant to whether or not I was the person given the drug and placed in the empty room. I open my eyes and seem to see several objects, including a lamp and a cup; let E be “I’m having a visual experience as of a lamp and a cup.” Of course, E leaves...

... of hallucinations in blindfolded subjects (“flashing lights, mirrors, lamps, trees”; “amorphous shapes”; “a mouse-like face”; “cities, skies, kaleidoscopes, lions, and sunsets”), see Merabet et al. 2004. 31. Admittedly psychedelic-induced hallucinations are sometimes taken to reveal the mysterium tremendum...

... it is unob- served. Consider the strangeness of saying that the color that an object is when it is unobserved is the color that it would appear to most human beings to be if it were seen against a neutral homogenous background under the illumination of a tungsten lamp at a certain temperature...

... of scarlet. If we change the lighting conditions, so that one half of the cloth is illuminated by “the direct rayes of the Sun,” while the other half is illuminated by a dimmer light source, like a lamp, the two halves of the cloth will appear to be different shades of red: “If you engage a skillful Painter...