Can an American black bear swallow a sun bear whole? Please answer step by step:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Sun bears grow to only about half the size of an American black bear. The total length of adult bear skulls was found to average 262 to 317 mm (10.3 to 12.5 in). Black bears cannot open their mouths to half their body length.
So, the final answer is no.