Cognitive Science, Volume 46, Issue 1, January 2022.

Botanical preparations used by shamans in rituals for divination, prophecy, and ecstasy contain widely different psychoactive compounds, which are incorrectly classified under a single denomination such as “hallucinogens,” “psychedelics,” or “entheogens.” Based on extensive ethnopharmacological search, I proposed a psychopharmacological classification of magic plants in 1979. This paper re-evaluates this taxonomy in the context of consciousness research. Several groups of psychodysleptic magic plants are proposed: (1) hallucinogens—psilocybin mushrooms, mescaline cacti, dimethyltryptamine snuffs, and the synthetic ergoline lysergic acid diethylamide induce strong (...) perceptual changes, affective intensification, and cognitive enhancement. Their ethnobotanical uses include long lasting divination rituals, prophecy, and sacramental practice. (2) Trance-inducers—ergoline Convolvulaceae and South American Banisteriopsis produce quietness, abstraction, lethargy, mild sensorial and cognitive changes, and salient visual imagery changes used in trance rituals and specific divination practices. (3) Cognodysleptics—marijuana (tetrahydrocannabinol) and other terpene-containing plants induce changes in thought, imagination, and affective functions and are used in short-term divination or oneiromancy. (4) Deliriants—tropane-containing Solanaceae, wild tobacco, and Amanita muscaria (muscimol) induce a delirium characterized by dim and clouded consciousness, stupor, confusion, disorientation, perception distortion, difficulties in recollection, anxiety, irritability, excitation, and behavioral disorganization employed in sorcery, purification, or exorcism rituals. The core mental effects required for a drug to be used in shamanistic rituals include light-headedness, enhanced imagery, and experience intensification. This constellation was the reason why, in his classification of psychoactive compounds, the pioneer German psychopharmacologist Louis Lewin established in 1924 a group of drugs under the appropriate name of Phantastica. (shrink)

For a long time, it was believed in Assyriology and related disciplines that šumma sentences, or grammatical conditionals, which appeared in cuneiform texts and tablets of astrology, exorcism, law, extispicy, oneiromancy, medicine, and divination, were linguistic expressions of logical conditionals. F. Rochberg (2010; 2016) extended this belief, suggesting that they are even material conditionals. Andrew Schumann (2017; 2020; 2021) followed this, claiming that, as a result, we can trace the origin of symbolic logic in cuneiform writings, through which it (...) moved to Greece. In this paper, after presenting this approach, I will challenge it by showing that šumma/IF sentences and similar constructs in cuneiform literature are arguments or implications that suffer from the same confusion between conditional and implication that Quine (1953/1966) highlighted when criticizing C.I. Lewis. (shrink)

In presenting self-preservation as the most general law of nature, set at the summit of the structure of the natural world, Francis Bacon characterized the universal appe- tite for self-preservation as an innate instinct which, in the case of living beings, is primarily associated with the emotion of fear. Bacon’s philosophy offers several tech- niques of self-care to manage the fear of accidents of fortune from which the existence and well-being of the self is under constant threat. This article reconstructs (...) Bacon’s treatment of divinatory arts and their contributions to self-care. We will explore how he adopts traditional divinatory arts and reforms them: oneirocritics, physiognomy, and astrology. We will contend that Bacon’s approach to divinatory arts as techniques for self-care and the management of fortune shows some salient points shared with his natural philosophy: in both cases, the approach is hermeneutical, with the goal of exerting human power. With regard both to nature and to fortune, however, our power to modify the state of things extends only so far. The range of decisions we can make is not unlimited but encompasses only what is “in our power,” that is, what depends on us. (shrink)