1. not determinate; not precisely fixed in extent; indefinite; uncertain. 2. not clear; vague. 3. not established.
Critical thinking is a way of deciding whether a claim is true, partially true, or false. Critical thinking is a process that leads to skills that can be learned, mastered and used. Critical thinking is a tool by which one can come about reasoned conclusions based on a reasoned process. This process incorporates passion and creativity, but guides it with discipline, practicality and common sense. It can be traced in the West to ancient Greece with its Socratic method and in the East to ancient India with the Buddhist kalama sutta and abhidharma literature. Critical thinking is an important component of many fields such as education, politics, business, and science.
Fuzzy logic is a form of many-valued logic; it deals with reasoning that is approximate rather than fixed and exact. Compared to traditional binary sets (where variables may take on true or false values) fuzzy logic variables may have a truth value that ranges in degree between 0 and 1. Fuzzy logic has been extended to handle the concept of partial truth, where the truth value may range between completely true and completely false. Furthermore, when linguistic variables are used, these degrees may be managed by specific functions. Irrationality can be described in terms of what is known as the fuzzjective.]citation needed[
The term "fuzzy logic" was introduced with the 1965 proposal of fuzzy set theory by Lotfi A. Zadeh. Fuzzy logic has been applied to many fields, from control theory to artificial intelligence. Fuzzy logics however had been studied since the 1920s as infinite-valued logics notably by Łukasiewicz and Tarski.
The term vagueness denotes a property of concepts (especially predicates). A concept is vague:
In everyday speech, vagueness is an inevitable, often even desired effect of language usage. However, in most specialized texts (e.g., legal documents), vagueness is distracting and should be avoided whenever possible.
Indeterminate has a variety of meanings in mathematics:
Philosophical logic refers to those areas of philosophy in which recognized methods of logic have traditionally been used to solve or advance the discussion of philosophical problems. Sybil Wolfram lists the study of argument, meaning, and truth in particular, while Colin McGinn includes identity, existence, predication, necessity, and truth as the main topics of his book on the subject. In the same vein, philosophical logic is often understood to address extensions and alternatives to classical logic—the so-called non-classical logics. Texts such as John P. Burgess' Philosophical Logic, the Blackwell Companion to Philosophical Logic, or the multi-volume Handbook of Philosophical Logic (edited by Dov M. Gabbay and Franz Guenthner) emphasize this latter usage, addressing both the formal aspects of these topics and their applications to associated philosophical problems.
& ∨ ¬ ~ → ⊃ ≡ | ∀ ∃ ⊤ ⊥ ⊢ ⊨ ∴ ∵
Analytic philosophy (sometimes analytical philosophy) is a style of philosophy that came to dominate English-speaking countries in the 20th century. In the United Kingdom, United States, Canada, Scandinavia, Australia, and New Zealand, the vast majority of university philosophy departments identify themselves as "analytic" departments.
The term "analytic philosophy" can refer to:
Philosophy of language
Indeterminacy or underdeterminacy may refer to:
Philosophy of language is concerned with four central problems: the nature of meaning, language use, language cognition, and the relationship between language and reality. For continental philosophers, however, the philosophy of language tends to be dealt with, not as a separate topic, but as a part of logic (see the section "Language and continental philosophy" below).
First and foremost, philosophers of language prioritize their inquiry on the nature of meaning. They seek to explain what it means to "mean" something. Topics in that vein include the nature of synonymy, the origins of meaning itself, and how any meaning can ever really be known. Another project under this heading of special interest to analytic philosophers of language is the investigation into the manner in which sentences are composed into a meaningful whole out of the meaning of its parts.