I always thought it was a dumb plot point, but obviously it’s whatever “half” definition however Thanos thought of it. So probably just half of sentient creatures, or something. The point is, the answer is whatever Thanos wanted.
In my head canon, there’s some species out there that didn’t ever get Thanos snapped. Why? Because he commanded the stones to randomly dust half the people in the universe. And it turns out that Thanos is just really racist against that one species and subconsciously didn’t consider them to be people.
I always thought it was a dumb plot point, but obviously it’s whatever “half” definition however Thanos thought of it. So probably just half of sentient creatures, or something. The point is, the answer is whatever Thanos wanted.
In my head canon, there’s some species out there that didn’t ever get Thanos snapped. Why? Because he commanded the stones to randomly dust half the people in the universe. And it turns out that Thanos is just really racist against that one species and subconsciously didn’t consider them to be people.