All I've done is shown that your assertion is faulty. So why not just admit that instead of fudging around and moving the goalposts? Nothing about the laws of physics defies interstellar travel. It is just a really major undertaking.
BTW: At one tenth C we're looking at around 200 stars that could be reached at a travel time between 50 - 300 years, including some of the ones that show promise for intelligent life.
I admit that my assertion is faulty and that theoretically would be possible to travel 26.2 trillion miles under the power of a small, on-board, nuclear reactor. It's just a very, very long way. And it doesn't overcome the fact that you still have zero evidence for aliens from Alpha Centauri, or anywhere else for that matter, having visited Earth.
I’m returning to this exchange from last night because I feel now that I was too quick to admit my assertion was faulty. (It was late, I was tired....

)
In
post 15796 I wrote:
I think you miss the point of the witch analogy. Witches on broomsticks defy the laws of physics. Aliens travelling light years across the cosmos in saucers defy the laws of physics.
Picking up on one point in my post you then accused me of “fudging around” and “moving goalposts” over the issue of interstellar travel, instead of addressing the main issues I raised, which was that Giordano Bruno and Galileo were scientists following the scientific method and this is a far cry from modern ufology. That’s disingenuous in itself. I still accept that my statement “interstellar travel defies the laws of physics” was erroneous, however the phrase I used in
my post #15787 was
“Your theory is nothing but pure fantasy” and I stand by that.
I have been reading (that’s what JREF is all about, after all) and learn that there all kinds of designs that could – theoretically – power us to the stars. Ion Thrusters and Solar Sails and all kinds of futuristic things. However, this doesn’t overcome what I see as you main problem with this argument about the relative proximity of the nearest stars, which is a distinct lack of life out there. Not just highly-evolved, intelligent life-forms with a desire, and technology, to travel to far flung corners of the galaxy
but any life whatsoever.
Not only that, you’ve failed to demonstrate a link between these massive interstellar ships of your imagination that travel across the galaxy for years (lifetimes?) and the
firefly luminous ball about the size of two Volkwagen Beetles doing figure of eights down a mountainside.
As another poster has noted here, you make far too many assumptions, folo, and when you make a layer cake of assumptions it is akin to making stuff up. It is science fiction fantasy, and so improbable that you might as well postulate witches on broomsticks for UFO sightings. After all, at least we have evidence that witches
actually exist.