The phonemes in parentheses—*ć, *š, *ĺ—are supported by only limited evidence, and are not assumed by all scholars. Sammallahti (1988) notes that while instances of *ć are found in all three of Permic, Hungarian and Ob-Ugric, there are "very few satisfactory etymologies" showing any correlation between the branches in whether *ć or *ś appears. In the other languages, no consistent distinction between these consonants is found. The evidence for the postalveolar sibilant *š however is "scarce but probably conclusive" (ibid): it is treated distinctly from *s only in the more western (Finno-Permic) languages, but certain loans from as far back as the Proto-Indo-European language have reflexes traceable to a postalveolar fricative (including *piši- or *peši- "to cook"). The possibility of *ĺ is not considered by him at all. In contrast, Janhunen, who considers Samoyedic evidence necessary for conclusions about Proto-Uralic, doubts that *š can be reconstructed, preferring to consider it a secondary, post-Proto-Uralic innovation (p. 210). He agrees with Sammallahti in omitting *ĺ and in only considering a single palatal obstruent as necessary to reconstruct; for the latter he suggests the sound value of a palatal stop, (p. 211).