Chalmers outlines several ways in which phenomenal concepts might be distinctive: :Suppose you go into the California desert and spot a succulent never seen before. You become adept at recognizing instances, and gain a recognitional command of their kind, without a name for it; you are disposed to identify positive and negative instances and thereby pick out a kind. These dispositions are typically linked with capacities to form images, whose conceptual role seems to be to focus thoughts about an identifiable kind in the absence of currently perceived instances.
Peter Carruthers suggests that phenomenal concepts are
purely recognitional, which means
Indexical concepts Several philosophers have suggested that phenomenal concepts denote brain states indexically, in a similar way as saying "now" picks out a particular time. Even given full knowledge of physics, additional indexical information is required to say where and when one is.
Quotational/constitutional concepts Some contend that phenomenal states are part of the concepts that refer to them. For instance, Papineau suggests that phenomenal concepts are
quotational, like saying "That state: ___." Katalin Balog defends a
constitutional account of phenomenal concepts, in which "token experiences serve as modes of presentation of the phenomenal properties they instantiate." For instance, the concept of pain is partly constituted by a
token experience of pain. He claims that normal physical identity statements (such as that heat is molecular kinetic energy) involve two descriptions, which we can associate in our minds. In contrast, we think about a phenomenal concept by either "actually undergoing the experience" or at least by imagining it, and this creates a "what-it’s-likeness" sensation. Then: :This subjective commonality can easily confuse us when we contemplate identities like
pains = nociceptive-specific neuronal activity. We focus on the left-hand side, deploy our phenomenal concept of pain (that feeling), and therewith feel something akin to pain. Then we focus on the right-hand side, deploy our concept of
nociceptive-specific neurons, and feel nothing (or at least nothing in the pain dimension—we may visually imagine axons and dendrites and so on). And so we conclude that the right hand side
leaves out the feeling of pain itself, the unpleasant what-it’s-likeness, and refers only to the distinct physical correlates of pain. Papineau compares the situation to the
use–mention distinction: Phenomenal concepts directly use the experiences to which they refer, while physical descriptions merely mention them. ==Chalmers' counter-argument==