Of course HP won't agree...
Of course HP won't agree. Their own internal valuation is highly likely being pumped up by their own sense of self worth, and the inclusion of a large proportion of the fantastical and unachievable future revenue projections that they make to investors every quarter. If investors are actually exposed to their "true" value and worth, then I'm sure a lot of those investors might choose to invest elsewhere.
As for Carl Icann... I couldn't care less. All he cares about is his own payday rather than the future of either company.