Similarly, the vast majority of n-stem nouns in Indic have a long stem-vowel, such as brahmāṇaḥ "Brahmins", śvānaḥ "dogs" (from *ḱwones), correlating with information from other Indo-European languages that they were originally *on-stems.
That faces particular problems in explaining the archaic form ānāśa 'he/she has reached' < *h₁eh₁noḱe, with its very idiosyncratic synchronic relation to Sanskrit √aś 'reach'.
The mystery was solved when the ending of the perfect in the first person singular was reanalyzed, on the basis of Hittite evidence as *-h₂e, beginning with an a-colouring laryngeal.
In other words, while Brugmann's Law was still operative, a form of the type *se-sod-h₂e in the first-person singular did not have an open root syllable.
[1][2][3][4][5][6][7][8][9][10][11][12] Jerzy Kuryłowicz, the author of the explanation of the sasada/sasāda matter (in his Études indoeuropéennes I), eventually abandoned his analysis for of an appeal to the theory of marked vs unmarked morphological categories.