न्यायमञ्जरी: प्रथम भाग (आचार्य जयन्त भट्ट - पं. सूर्यनारायण शुक्ल सम्पादित, काशी संस्कृत ग्रन्थमाला)

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There is अ, then ग्नि?
Wait, look at अग्नि in line 14: पर्वताग्नी इति
Line 15: नाग्निविशिष्टधराधरधर्मतया -> here नाग्नि has ना + ग्नि (with ि matra).
Line 15/16: यत्र धूमस्तत्राग्निमान् -> ग्नि has ि matra.
Now look at line 13:
त्वम् अग्निधर्मत्वाद् धूमस्य?
Wait, between त्वम् and धर्मत्वाद्:
There is अ then ग्नि? Wait, is there an ि? No, it looks like अग्नि without the top curl, or does it have the curl? It has a vertical line before ग: that's ि! But the top loop is very faint or broken: अग्निधर्मत्वाद्!
Wait, could it be अनग्निधर्मत्वाद्?
No, only one letter between त्वम् and धर्मत्वाद्: अग्नि!
Wait, why would it say "अग्निधर्मत्वाद् धूमस्य"? Wait, in Nyaya:
If fire is the sadhya, who is the paksha? The mountain. But here: "धर्मे हि साध्ये न हेतोः पक्षधर्मत्वम्" - if the dharma (