Three Disputed Grammar Items: Adjudicating the Key Before Marks Are Uploaded
Your Kannada teacher returns the grammar test and ten students dispute three items. The answer key gives: (i) ಸೂರ್ಯೋದಯ = ಸೂರ್ಯ + ಉದಯ, ಗುಣಸಂಧಿ; (ii) in the sentence ನೀವು ಒಳ್ಳೆಯ ಶಿಕ್ಷಕರು, the word ನೀವು is ಬಹುವಚನ; (iii) the plural of ಮಗು is ಮಕ್ಕಳು. Six students wrote ಲೋಪಸಂಧಿ for (i) because 'a letter disappears'. Two wrote ಏಕವಚನ for (ii), arguing that the sentence addresses one teacher and that marking it ಬಹುವಚನ is therefore wrong in meaning. Four wrote ಮಗುಗಳು for (iii), saying the standard plural suffix is -ಗಳು. The teacher is willing to accept any answer that can be justified by a stated rule, but only before the marks are uploaded in two days. You have been asked, as class representative, to prepare a one-page ruling with the rule and the mark for each disputed item.
1. Rule on item (i). Show the vowel arithmetic and explain why 'a letter disappears' is not the operative rule here.
Read the worked answer
Arithmetic. ಸೂರ್ಯ ends in ಅ; ಉದಯ begins with ಉ. ಅ + ಉ = ಓ. So ಸೂರ್ಯ + ಉದಯ → ಸೂರ್ಯೋದಯ.
Why not lopa. In ಲೋಪಸಂಧಿ one vowel is simply dropped and no new vowel quality appears. Here two vowels have merged into a third, ಓ, which is neither of the inputs. That is the definition of ಗುಣಸಂಧಿ, and it is exactly why the students' description - 'a letter disappears' - is true of the spelling but false of the process. Two letters did disappear; a third appeared in their place, and the name of a sandhi follows the process, not the count of lost letters.
The discriminator to give the class. Ask what the resulting vowel is. If it equals one of the two inputs (usually a long counterpart), it is ಸವರ್ಣದೀರ್ಘ. If it is a new ಗುಣ vowel (ಏ, ಓ), it is ಗುಣಸಂಧಿ. If it is a vriddhi vowel (ಐ, ಔ), it is ವೃದ್ಧಿಸಂಧಿ. If nothing new appears at all, only then consider ಲೋಪ.
Ruling and marks. The split ಸೂರ್ಯ + ಉದಯ is correct and should earn the split mark. The name ಲೋಪಸಂಧಿ is wrong: no mark for the name. Partial credit for the split is fair because it shows the student located the boundary correctly.
2. Rule on item (ii), where the students' objection concerns meaning rather than form.
Read the worked answer
Separate form from use. ನೀವು belongs to the ಬಹುವಚನ series in form, alongside ಅವರು and ತಾವು. That is a grammatical fact about the pronoun's paradigm and does not change with context.
What the students have actually noticed. When ನೀವು is used for a single person it carries ಗೌರವಾರ್ಥ - honorific register. That is a fact about meaning and social use, not about vacana. Both statements can be true at once: the form is plural, the reference is singular and respectful.
Ruling. The key's bare 'ಬಹುವಚನ' is correct and stands. A student who wrote only ಏಕವಚನ - with no mention of ಗೌರವಾರ್ಥ - has confused meaning with form and should not be re-marked.
The concession worth making. The fully correct answer is 'ಬಹುವಚನ ರೂಪ; ಏಕವಚನಕ್ಕೆ ಗೌರವಾರ್ಥ ಬಳಕೆ'. A student who wrote that, or who wrote ಏಕವಚನ with ಗೌರವಾರ್ಥ explicitly stated, has shown more understanding than the key demands. Recommend to the teacher that such scripts be awarded the mark, and that the key be amended with a bracketed note for future tests.
Why the distinction matters beyond this item. It is the same confusion that produces errors in ವಚನ conversion exercises and in agreement questions, so it is worth ten minutes of class time rather than a quiet re-mark.
3. Rule on item (iii). State the general rule, the exceptions, and the fair mark.
Read the worked answer
General rule. The productive plural suffixes are -ಗಳು for non-human nouns (ಮನೆ → ಮನೆಗಳು, ಮರ → ಮರಗಳು) and -ರು for human nouns (ಹುಡುಗ → ಹುಡುಗರು, ಶಿಕ್ಷಕ → ಶಿಕ್ಷಕರು). The students' rule is therefore real and worth knowing; it simply is not universal.
The exception class. A small number of very high-frequency nouns have irregular or suppletive plurals that must be memorised, and ಮಗು → ಮಕ್ಕಳು is the standard example. It is human, so -ಗಳು would not apply in any case; but it also does not take -ರು. It belongs to the memorised list, not to a rule.
Ruling. The key is correct. ಮಗುಗಳು is not a defensible variant; it is the over-application of a rule to an item that is explicitly an exception.
Fair mark. No mark for ಮಗುಗಳು. The teacher may acknowledge in class that the reasoning was sound in general and failed only on a listed exception - that preserves the student's confidence in the rule while making clear that irregular plurals are examinable material to be learnt by heart. Recommended practice: build a class list of these irregulars (ಮಗು → ಮಕ್ಕಳು and similar high-frequency items) and test them as a separate set, so a single irregular does not discredit a rule the students have understood correctly.