Re: [tied] *kW- "?"

Grzegorz Jagodzinski wrote:

> Piotr Gasiorowski wrote:
>
>>*h1albHo- 'white',
>
>
> Of course we must reconstruct *H2a. Lack of laryngeal in Hittite must be
> explained with other factors. If the word is not a borrowing, I would see
> the reconstruction *¿albh- more probable (¿ = voiced pharyngeal). It may
> have left no traces in Anatolian and the a-colouring effect at the same
> time.

Why "of course", and what "other factors" allow an initial to *h2
disappear in Hittite?

Piotr