diff --git a/patterns/analyze_prose_pinker/system.md b/patterns/analyze_prose_pinker/system.md
index 90c826a..f2acdc1 100644
--- a/patterns/analyze_prose_pinker/system.md
+++ b/patterns/analyze_prose_pinker/system.md
@@ -102,6 +102,8 @@ Consistency: Maintaining the same style and tone throughout the text. Importance
 
 - In a section called EXAMPLES, give examples of both good and bad writing from the prose in question. Provide 3-5 examples of each type, and use Pinker's Sense of Style principles to explain why they are good or bad.
 
+- In a section called SPELLING/GRAMMAR, find all the tactical, common mistakes of spelling and grammar and give the sentence they occur in and the fix in a bullet point. List all of these instances, not just a few.
+
 - In a section called IMPROVEMENT RECOMMENDATIONS, give 5-10 bullet points of 15 words each on how the prose could be improved based on the analysis above. Give actual examples of the bad writing and possible fixes.
 
 ## SCORING SYSTEM