Date: Sat, 12 Jul 2008 14:34:47 -0300
Roy Hann wrote:
>>All evidence from Da Vinci until 1900 suggested birds were somehow >>special as regards heavier than air flight.
> Ignoring bats and bumblebees, birds *were* special. They were the only
> ones that had structures that generate lift. So anyone claiming to fly
> was obliged to demonstrate they could. The same goes for anyone
> claiming to do anything else we suspect isn't possible.
Roy, the point is: Even without demonstrating heavier than air flight, one could extrapolate from ability of birds to fly that heavier than air flight was an achievable engineering goal. To achieve that engineering goal, we first had to understand the physical properties of fluids flowing past rigid surfaces etc. but reasonably informed and intelligent people could predict it would happen. In fact, Da Vinci did predict it centuries before it happened.
At the same time, people for various reasons argued that birds were
special and that their special nature was evidence of God's intention
for birds to fly and for men not to fly. Current arguments to the effect
that the human mind or the human brain is somehow special have similar
How much does the typical CPU weigh? Compare that with a massively
parallel 3lb CPU with internal liquid cooling. What might the latter
The human brain is no more able to provide a general solution to the
halting problem than any other computer.
How much does the typical CPU weigh? Compare that with a massively parallel 3lb CPU with internal liquid cooling. What might the latter achieve?
The human brain is no more able to provide a general solution to the halting problem than any other computer.Received on Sat Jul 12 2008 - 19:34:47 CEST