Religious Skepiticism
Knowledge is a journey, not an event. The key thing is to keep making effort, keep progressing, and accepting and adapting to truth as it unfolds for someone. The minimum requirements for a Muslim are to believe in God, the Day of Judgement, and to do good deeds. There is nothing inherently wrong with skepticism but it has to be productive with acceptance of the boundaries of knowledge as well as truth as it unfolds within those boundaries.