In computer science, an ambiguous grammar is a context-free grammar for which there exists a string that can have more than one leftmost derivation or parse tree, while an unambiguous grammar is a context-free grammar for which every valid string has a unique leftmost derivation or parse tree. Many languages admit both ambiguous and unambiguous grammars, while some languages admit only ambiguous grammars. Any non-empty language admits an ambiguous grammar by taking an unambiguous grammar and introducing a duplicate rule or synonym (the only language without ambiguous grammars is the empty language). A language that only admits ambiguous grammars is called an , and there are inherently ambiguous context-free languages. Deterministic context-free grammars are always unambiguous, and are an important subclass of unambiguous grammars; there are non-deterministic unambiguous grammars, however. For computer programming languages, the reference grammar is often ambiguous, due to issues such as the problem. If present, these ambiguities are generally resolved by adding precedence rules or other context-sensitive parsing rules, so the overall phrase grammar is unambiguous. Some parsing algorithms (such as (Earley or GLR parsers) can generate sets of parse trees (or "parse forests") from strings that are syntactically ambiguous. (Wikipedia).
Scope Ambiguity - Semantics in Linguistics
We take a look at Scope Ambiguity in this #semantics and #syntax video in #linguistics. We look at logical form to see how we can represent this in a tree structure to get two meanings. We also look at a little trick of translating predicate logic sentences with more than one quantifier.
From playlist Semantics in Linguistics
This E-Lecture discusses and exemplifies the phenomenon of ambiguity, ranging from lexical to pragmatic. And as usual, Prof. Handke uses numerous examples to illustrate this ubiquous property of natural language expressions.
From playlist VLC103 - The Nature of Meaning
DEFINITE AND INDEFINITE ARTICLES - ENGLISH GRAMMAR
We discuss the indefinite articles a, an, and definite article the. 'the' is used when a noun exists and is unique. 'a' or 'an' is used for non-specific nouns. 'a' is used before words that start with a consonant sound. 'an' is used before words that start with a vowel sound. If you want
From playlist English Grammar
In this video, you’ll learn more about when to use "whose" and "who's" correctly in American English. Visit https://www.gcflearnfree.org/grammar/whos-or-whose/1/ for our text-based lesson. We hope you enjoy!
From playlist Grammar
This E-Lecture is a continuation of "Ambiguity". Prof. Handke discusses and exemplifies the types of vagueness including some general problems, such as, the fuzziness of boundaries or habitual use.
From playlist VLC103 - The Nature of Meaning
NOUN PHRASES - ENGLISH GRAMMAR
We discuss noun phrases. Noun phrases consist of a head noun, proper name, or pronoun. Noun phrases can be modified by adjective phrases or other noun phrases. Noun phrases take determiners as specifiers. We also draw trees for noun phrase. you want to support the channel, hit the "JOIN"
From playlist English Grammar
CONCRETE NOUNS and ABSTRACT NOUNS - ENGLISH GRAMMAR
Concrete nouns are nouns that can be heard, tasted, smelled, touched, or seen. Abstract nouns are nouns that can be believed, felt emotionally, understood, learned, or known. LIKE AND SHARE THE VIDEO IF IT HELPED! Support me on Patreon: http://bit.ly/2EUdAl3 Visit our website: http://
From playlist English Grammar
An introduction to the general types of logic statements
From playlist Geometry
Theory of Computation 5. Context Free Languages ADUni
From playlist [Shai Simonson]Theory of Computation
Introduction to Lexical Analyzer and Grammars | L 2 | Compiler Design | GATE CS #RavindrababuRaula
Click for free access to Educator's best classes: : https://unacademy.com/a/%27Top-best-classes-in-CS-IT.html%27 For regular updates follow : https://unacademy.com/community/IMHMWX/ To purchase please click : https://unacademy.onelink.me/081J/2ouowqvl
From playlist Compiler Design
Stanford CS224N - NLP w/ DL | Winter 2021 | Lecture 4 - Syntactic Structure and Dependency Parsing
For more information about Stanford's Artificial Intelligence professional and graduate programs visit: https://stanford.io/3w4757l Syntactic Structure and Dependency parsing 1. Syntactic Structure: Consistency and Dependency (30 mins) 2. Dependency Grammar and Treebanks (15 mins) 3. Tran
From playlist Stanford CS224N: Natural Language Processing with Deep Learning | Winter 2021
Python - Analyzing Sentence Structure
Lecturer: Dr. Erin M. Buchanan Summer 2019 https://www.patreon.com/statisticsofdoom This video covers how to analyze sentence structure using Python and nltk. This video scales up the parsing discussion from the previous chapter, looking more at parse trees and how to parse effectively. Y
From playlist Natural Language Processing
Lecturer: Dr. Erin M. Buchanan Summer 2020 https://www.patreon.com/statisticsofdoom This video is part of my Natural Language Processing course. This video covers parsing, which is creating sentence structure for understanding meaning. You will learn both traditional constituency parsin
From playlist Natural Language Processing
Compiler Design | L - 9 | Operator grammar & Operator precedence parser | CS/IT #RavindrababuRaula
Click for free access to Educator's best classes: : https://www.unacademy.com/a/Best-Classes-of-all-time-by-Vishvadeep-Gothi-CS.html For regular updates follow : https://unacademy.com/community/Q3ZGJY/ To purchase please click : https://unacademy.onelink.me/081J/zv9co3u1
From playlist Compiler Design
Lecture 11 – Semantic Parsing | Stanford CS224U: Natural Language Understanding | Spring 2019
For more information about Stanford’s Artificial Intelligence professional and graduate programs, visit: https://stanford.io/ai Professor Christopher Potts & Consulting Assistant Professor Bill MacCartney, Stanford University http://onlinehub.stanford.edu/ Professor Christopher Potts Pr
From playlist Stanford CS224U: Natural Language Understanding | Spring 2019
The Difference Between an Expression and an Equation
This video explains the difference between an expression and an equation. Site: http://mathispower4u.com Blog: http://mathispower4u.wordpress.com
From playlist Introduction to Linear Equations in One Variable
R & Python - Parsing Part 1 (2022)
Lecturer: Dr. Erin M. Buchanan Spring 2022 https://www.patreon.com/statisticsofdoom This video is part of my Natural Language Processing course. This video covers parsing, which is creating sentence structure for understanding meaning. You will learn both traditional constituency parsing
From playlist Natural Language Processing
Theory of Computation Recitation 4
Theory of Computation Recitation 4 aduni
From playlist [Shai Simonson]Theory of Computation
[Syntax] Introduction and Glossing
We introduce what syntax is, talk about glossing, as well as do a couple examples in languages other than English. We also cover some basic word order, adjective order, and really basic morphology. LIKE AND SHARE THE VIDEO IF IT HELPED! Visit our website: http://bit.ly/1zBPlvm Subscribe
From playlist Syntax
4. Pushdown Automata, Conversion of CFG to PDA and Reverse Conversion
MIT 18.404J Theory of Computation, Fall 2020 Instructor: Michael Sipser View the complete course: https://ocw.mit.edu/18-404JF20 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP60_JNv2MmK3wkOt9syvfQWY Quickly reviewed last lecture. Defined context free grammars (CFGs) a
From playlist MIT 18.404J Theory of Computation, Fall 2020