diff --git a/manuscript.html b/manuscript.html
index 7164532..db975b8 100644
--- a/manuscript.html
+++ b/manuscript.html
@@ -211,6 +211,14 @@
       if (A[i] === B[j]) { mask[bw[j]] = true; i++; j++; }
       else if (L[i + 1][j] >= L[i][j + 1]) i++; else j++;
     }
+    // a lone "the" that happens to match is not Baum's sentence: only runs of
+    // three or more matching words count as his
+    var run = [];
+    for (var q = 0; q <= bw.length; q++) {
+      if (q < bw.length && mask[bw[q]]) { run.push(bw[q]); continue; }
+      if (run.length && run.length < 3) run.forEach(function (idx) { mask[idx] = false; });
+      run = [];
+    }
     for (var k = 0; k < b.length; k++) if (/^\s+$/.test(b[k])) mask[k] = (k > 0 && mask[k - 1]) && (k + 1 < b.length && mask[k + 1]);
     return { parts: b, mask: mask };
   }