Assertion: whale | /r/CapableOf | develop gill
Facets:
Source sentences:
text: Would it make sense for a whale to develop gills if it weren’t going to maintain a deep underwater existence where it had no choice but to develop a way to extract oxygen from the water, and if not is there any point in making a whale cold-blooded as it will likely never maintain these freezing and completely dark depths for extended periods of time?