Meaning of せんがく in Japanese

浅学な人ほど自分が正しいと思っている典型ですね。
He's a classic case that the more ignorant people are the more sure they are that they are correct.

浅学非才の私ではありますが、何とぞ皆様のお力を賜りたく、ここにお願い申し上げる次第です。
I may not have much to offer in the way of learning or ability, but I want to do whatever I can for us all and humbly ask for your favor.