Makaya simply doesn't understand how big the numbers involved are. He hasn't any understanding of probability and chance. He hasn't said why Earth is unique he just spouts personal incredulity. If he thinks the Drake Equation is woo then I'd like to see him come up with his own equations and mathematics to support the premise that Earth is the only place where (intelligent) life can form.
Maths I want to see the maths. However I can guarantee that there won't be any because he's a) incapable of doing the sums because he doesn't understand the numbers involved b) the maths will show that the chance of life is greater than zero.
It's a pointless waste of time arguing because he is incapable of grasping that the universe is incredibly large and that there are enormous numbers of stars that will have a percentage of planets that at some point in their lives will contain the conditions for life to start and evolve. It happened on earth so why are we special or any different to anywhere else?
Yeah, the universe is large alright, but most of it is empty between galaxies.
Ummm no. You've completely missed the point.
For example; if I were to ask you how many sultanas there are in a rice pudding you wouldn't be concerned with the distance(s) between sultanas, just the number of sultanas.
It is a fair assumption that the spaces between galaxies and solar systems are uninhabitable because, ummm well, there's nothing there that we have observed that looks like supporting life whatsoever. However, you shouldn't use density as a function to look at this problem. Why would you consider the amount of rice pudding when counting the sultanas in it? You could have a rice pudding that will fill an ordinary bowl with 100 sultanas or, for example, enough rice pudding to fill the Colosseum and only 2 sultanas. Which one contains life? Which one is more likely to contain life?
My point about the numbers is that there are an awful lot of sultanas out there.
125,000,000,000 galaxies.
50,000,000 (lets take your estimate of 50 million stars - we know that some galaxies have as many as a billion but lets be conservative).
= 6,250,000,000,000,000,000 star systems
I've already shown you that it would take just under 4,000 years to count 125 billion galaxies at one per second.
How long would it take to count the number of star systems at the same rate? Kamaya - please do the calculation. That's just a conservative estimate for what we can see let alone what we cannot. How can anyone possibly dismiss ALL of those resulting solar systems? What are the criteria? It's estimated that 5% of those suns are like ours. Again work the numbers. Even if they are tiny then there is huge potential for life to be out there/lived and died/not yet born.
We may live in a giant rice pudding that has galaxies and stars far less dense than a Colosseum rice pudding with only two sultanas, but the fact remains that there are a huge number of sultanas!
Distance is only a factor when we look at whether communication or travel is possible. Who knows, there maybe huge amounts of intergalactic chatter going on, but we just don't hear it because we don't have the technology; there may be some sub-aether wooband where the best pangalactic gargleblaster recipe is being discussed. Imagine having the telegraph and being able to send messages, but never know the internet exists.
It's the enormous number that is the key. Why on earth would we be unique? It's a 1/6,250,000,000,000,000,000 chance (just to put a number on it) that we are the only life forms. We may well be alone but I like the odds on the other side.
None of us here is saying that we are or aren't the only intelligent life, what we are saying is that the odds are massively stacked against us being the only intelligent life.
I find it the hight of arrogance when people say we are created in god's image and I also find it arrogant that we could be considered to be the only sentient life; it lacks an understanding of the numbers, but above all, imagination.