How Plagiarism Checking Works

A transparent explanation of syntactic overlap, shingling, and deep semantic paraphrase detection.

1. Multi-Tier Similarity Architecture

Cluster AI combines fast syntactic filtering with deep neural sequence models:

K-Shingling & Jaccard Index: Decomposes text into contiguous character and word sequences to detect verbatim copying and partial sentence borrowing.
Normalized Levenshtein Edit Distance: Identifies near-duplicate sentences where minor words or punctuation have been adjusted.
Deep Bi-LSTM Sequence Matching: Evaluates sentence semantics to detect sophisticated paraphrasing where original wording has been rewritten but underlying conceptual structure remains identical.