put back plural exclusions

utils.py

@@ -847,7 +847,7 @@ def is_plural_wordnet(word):
     plural_synsets = wordnet.synsets(word.rstrip('s'), pos=wordnet.NOUN)
     return len(plural_synsets) > len(singular_synsets)
 
-def is_plural(word):
+def is_plural_pos(word):
     """Determine if a word is plural using NLTK's part-of-speech tagging."""
     # Tokenize the input word (necessary for NLTK tagging)
     tokens = word_tokenize(word)
@@ -856,6 +856,12 @@ def is_plural(word):
     # Check if the word is tagged as plural (NNS or NNPS in Penn Treebank tags)
     return pos in ["NNS", "NNPS"]
 
+def is_plural(word):
+    """Check if a word is plural."""
+    if word in PLURAL_TO_SINGULAR_EXCLUSIONS:
+        return False
+    return is_plural_regex(word) or is_plural_pos(word) or is_plural_wordnet(word)
+
 def singular_to_plural(word):
     """Convert singular words to plural using inflect."""
     plural = p.plural(word)
@@ -865,10 +871,6 @@ def plural_to_singular(word):
     """Convert plural word to singular using inflect."""
     if is_plural(word):
         return p.singular_noun(word) or word 
-    if is_plural_regex(word):
-        return p.singular_noun(word) or word 
-    if is_plural_wordnet(word):
-        return p.singular_noun(word) or word 
     return word
 
 plural_MATH_WORDS = [singular_to_plural(word) for word in MATH_WORDS]