Plagiarism: taking any sequence of more than three words without citing is stealing work from others. Taking an idea, image (photograph, table, or graph) without citing is also plagiarism and may also violate copyright laws.
As a guide a returned percentage of below 15% would probably indicate that plagiarism has not occurred. However, if the 15% of matching text is one continuous block this could still be considered plagiarism.
Reproducing a long string of generic words would not be considered plagiarism, while copying a single word—if used for the first time, or in a novel way by a source—could be.
Mostly, no more than 20% of text coincidence can be tolerated, while more means the text is not original. Although, even if that 20% is just a single copy-pasted piece of text, it's considered borrowed. On the other hand, it may be unintentional plagiarism.
Copying a portion of text from another source without giving credit to its author and without enclosing the borrowed text in quotation marks.
Plagiarism: taking any sequence of more than three words without citing is stealing work from others. Taking an idea, image (photograph, table, or graph) without citing is also plagiarism and may also violate copyright laws.
Text and Data
You can use up to 10%, but no more than 1000 words, of essays, articles, or stories, of a single copyrighted work. You can use up to 250 words of an entire poem, or a portion of a poem. You may not use more than 3 poems or portions of poems by one poet, or by different poets in the same book.
to copy up to one chapter or 10% of the number of words of a work published electronically. It is a fair dealing to copy one chapter even if it is longer than 10% of the pages or words in the work.
Plagiarism can have serious consequences, even when it's done accidentally. To avoid plagiarism, it's important to keep track of your sources and cite them correctly.
My understanding is that the toughest standard regarding plagiarism is the "five (consecutive) word" rule, which holds that, if there are five consecutive words identical to someone else's writing, then you are guilty of plagiarism.
Average similarity index – up to about 50% of matches
It is quite normal for an essay to have up to 50% of matches to other items; or even more. This does not mean you are guilty of plagiarism.
Expressing an idea in your own words, and giving credit. Using a direct quote, and giving credit. Stating a fact, and giving credit. Paraphrasing or summarizing, and giving credit.
The Copyright Act expressly states that certain acts constitute fair dealings, such as copying up to 10% or one chapter of a book, or copying one article, for research or study. However in other cases, you will need to consider the elements of fair dealing as set out in the Copyright Act.
The fair dealing provisions allow limited use of copyright material without requiring permission from the copyright owner. Fair dealing only applies to certain purposes: Research or study. Criticism or review.
Generally copyright lasts for: 70 years for works after the death of the author. 70 years from publication for sound recordings and films after being made public. 50 years for television and radio broadcasts after being broadcast.
Copyright does not protect names, titles, slogans, or short phrases. In some cases, these things may be protected as trademarks.
Fair Use Length Guidelines
Up to 250 words. Entire article, story, or essay. Up to 10% or 1,000 words, whichever is fewer, but can use at least 500 words.
Unfortunately, quoting or excerpting someone else's work falls into one of the grayest areas of copyright law. There is no legal rule stipulating what quantity is OK to use without seeking permission from the owner or creator of the material.
“Presenting work or ideas from another source as your own, with or without consent of the original author, by incorporating it into your work without full acknowledgement.
The Similarity Index percentage
This shows the total amount of matched text as a proportion of the assignment. This 'at a glance' guide should not be used as a measure of plagiarism. Even a 1% score could potentially be plagiarised. There is no ideal percentage to look for.
Nearly two months after releasing an artificial intelligence writing detection feature, plagiarism detection service Turnitin has reported a “higher incidence of false positives” — or incorrectly identifying fully human-written text as AI-generated text — when less than 20% of AI writing is detected in a document.