Answer:
The answer is below
Explanation:
1. Douglas, in his argument, which he expressed through various articles and autobiographies, claimed that enslaved Americans were indeed human by stating that blacks have shown to be rational thinkers or humans who have the apparent characteristics of humanity that are then abused savagely by the white people.
2. Yes, the argument is valid because if blacks are not humans, blacks would not have express rationality like their white counterparts believed to be only humans. Blacks have shown human traits such as compassion, sincerity, strength, self-awareness, etc.