Doubt in the context of "Skepticism"

The Latin cogito, ergo sum, usually translated into English as "I think, therefore I am", is the "first principle" of René Descartes' philosophy. He originally published it in French as je pense, donc je suis in his 1637 Discourse on the Method, so as to reach a wider audience than Latin would have allowed. It later appeared in Latin in his Principles of Philosophy, and a similar phrase (Ego sum, ego existo, 'I am, I exist') also featured prominently in his Meditations on First Philosophy. The dictum is also sometimes referred to as the cogito. As Descartes explained in a margin note, "we cannot doubt of our existence while we doubt." In the posthumously published The Search for Truth by Natural Light, he expressed this insight as dubito, ergo sum, vel, quod idem est, cogito, ergo sum ("I doubt, therefore I am—or what is the same—I think, therefore I am."). Antoine Léonard Thomas, in a 1765 essay in honor of Descartes, presented it as dubito, ergo cogito, ergo sum ("I doubt, therefore I think, therefore I am.").

Descartes's statement became a fundamental element of Western philosophy, as it purported to provide a certain foundation for knowledge in the face of radical doubt. While other knowledge could be a figment of imagination, deception, or mistake, Descartes asserted that the very act of doubting one's own existence served—at minimum—as proof of the reality of one's own mind; there must be a thinking entity—in this case the self—for there to be a thought.

Philosophical methodology encompasses the methods used to philosophize and the study of these methods. Methods of philosophy are procedures for conducting research, creating new theories, and selecting between competing theories. In addition to the description of methods, philosophical methodology also compares and evaluates them.

Philosophers have employed a great variety of methods. Methodological skepticism tries to find principles that cannot be doubted. The geometrical method deduces theorems from self-evident axioms. The phenomenological method describes first-person experience. Verificationists study the conditions of empirical verification of sentences to determine their meaning. Conceptual analysis decomposes concepts into fundamental constituents. Common-sense philosophers use widely held beliefs as their starting point of inquiry, whereas ordinary language philosophers extract philosophical insights from ordinary language. Intuition-based methods, like thought experiments, rely on non-inferential impressions. The method of reflective equilibrium seeks coherence among beliefs, while the pragmatist method assesses theories by their practical consequences. The transcendental method studies the conditions without which an entity could not exist. Experimental philosophers use empirical methods.

Suspense is a state of anxiety or excitement caused by mysteriousness, uncertainty, doubt, or undecidedness. In a narrative work, suspense is the audience's excited anticipation about the plot or conflict (which may be heightened by a violent moment, stressful scene, puzzle, mystery, etc.), particularly as it affects a character for whom the audience feels sympathy. However, suspense is not exclusive to narratives.

Distrust is a formal way of not trusting any one party too much in a situation of grave risk or deep doubt. It is commonly expressed in civics as a division or balance of powers, or in politics as means of validating treaty terms. Systems based on distrust simply divide the responsibility so that checks and balances can operate. The phrase "trust, but verify" refers specifically to distrust.

Grunge (originally known as the Seattle Sound) is an alternative rock genre and subculture that emerged during the mid-1980s in the U.S. state of Washington, particularly in Seattle and Olympia, and other nearby cities. Grunge fuses elements of punk rock and heavy metal, and features the distorted electric guitar sound used in both genres, as well as bass guitar, drums, and vocals. Grunge also incorporates influences from indie rock bands such as Sonic Youth, Pixies, and Dinosaur Jr. Lyrics are typically angst-filled and introspective, often addressing themes such as social alienation, self-doubt, abuse, neglect, betrayal, social isolation and emotional isolation, addiction, psychological trauma, and a desire for freedom.

The early grunge movement revolved around Seattle's independent record label Sub Pop and the region's underground music scene, with local bands such as Green River, the Melvins, and Mudhoney playing key roles in the genre's development. Sub Pop marketed the style shrewdly, encouraging media outlets to describe the Seattle sound as "grunge"; the style became known as a hybrid of punk and metal. By the early 1990s, its popularity had spread, with similar sounding bands appearing in California, then emerging in other parts of the United States and Australia, building strong followings and signing major record deals. Grunge broke through into the mainstream in the early-to-mid-1990s, led by Nirvana's Nevermind in 1991, and followed by other crossover successes including Pearl Jam's Ten, Soundgarden's Badmotorfinger, and Alice in Chains' Dirt. The success of these bands boosted the popularity of alternative rock, eventually making grunge the most popular form of hard rock music during the 1990s.