CHARIKAR, Afghanistan  As Americans, including President Obama’s top advisers, tensely debate whether to send more American troops to Afghanistan, Afghans themselves are having a similar discussion and voicing serious doubts.

In bazaars and university corridors across the country, eight years of war have left people exhausted and impatient. They are increasingly skeptical that the Taliban can be defeated. Nearly everyone agrees that the Afghan government must negotiate with the insurgents. If more American forces do arrive, many here say, they should come to train Afghans to take over the fight, so the foreigners can leave.

“What have the Americans done in eight years?” asked Abdullah Wasay, 60, a pharmacist in Charikar, a market town about 25 miles north of Kabul, expressing a view typical of many here. “Americans are saying that with their planes they can see an egg 18 kilometers away, so why can’t they see the Taliban?”

Such sentiments were repeated in conversation after conversation with more than 30 Afghans in Kabul and nearby rural areas and with local officials in outlying provinces. The comments point to the difficulties that American and Afghan officials face if they choose to add more foreign troops.