🚀 go-pugleaf

[The scene: Aristotle is accidentally translated in time to the late
20th century, while working on the Physics. He asks a Modern Physicist
to help him to catch up with things.]
MP: I hear that you believe that a free particle will eventually come to
rest, even if subject to no force.
A: Well, I'm open to correction.
MP: Take a look in the library.
[Later]: A: I have updated my views with the aid of this text on quantum
field theory. It seems that,eg, spacecraft are able to continue moving
without the use of their propulsion systems. I reconcile my views with
this as follows: clearly there is some interaction here [let us call it
"inertia"] mediated by some hitherto undetected particle which I hereby
dub the "inerton", with a spin that may readily be calculated....
MP: No! No! You have it all wrong! A free particle moves in a straight
line at constant speed. It does this not because of some "interaction",
but rather because it is subject to NO interactions! Back to the
library!
[Later] A: I have been reading 
newton. What a beautiful conception, this First Law! But what really
convinces me is the magnificent use to which this fellow Einstein has
put it.
MP: How do you mean?
A: Well, Einstein has explained gravity by transferring it from the
domain of the Second Law to that of the First. A free particle moves
along a "straight line", where this expression is taken to mean a
geodesic in the appropriate spacetime. Thus we can say, eg, that the
Earth moves around the Sun, not, as Newton mistakenly thought, because
the Sun and the Earth interact, but rather because they DO NOT interact!
If they interacted, the motion would not be geodesic. Magnificent!
MP: No! No! You have it all wrong! The Earth moves around the Sun
because there is some interaction [let us call it "gravity"] mediated by
some hitherto undetected particle which I hereby dub the "graviton",
with a spin that may readily be calculated........
Moral: It takes more than an Einstein to abolish the fantasy of the
"gravitational interaction".