Add diagram illustrating deduplication

README.md

@@ -98,6 +98,8 @@ Debaters will often reuse the same evidence across different debates and repurpo
 - `bucketId` Duplicate evidence will share the same `bucketId`
 - `duplicateCount` is the number of other pieces of evidence in the same bucket. This is useful as a rough measure of argument quality, since good arguments tend to be used more.
 
+<img src="./deduplication.svg" alt="deduplication diagram" height="600px">
+
 #### Files
 
 Evidence is uploaded in .docx files. For evidence uploading during the debate season, each file is typically contains all the evidence used in a specific speech. For evidence uploaded to the preseason "Open Evidence" project, each file will typically contain a collection of evidence relating to a specific argument.