The practice of “putting out a fleece” is not widespread among evangelicals these days, at least as far as I know. You’re probably familiar with the phrase though. We might call it the superstitious interpretation of events as divine guidance in an area where God has already revealed his will.
So you ask for a specific bit of circumstantial evidence, and if the thing you have prayed for happens, you interpret it as God’s direction to move forward with your plans. “Lord, if it rains tomorrow, then I will know you want me to go to Bible College even though my parents want me to go to university.” “Lord, if the phone rings in the next five minutes, I’ll know I should leave my husband.” That sort of thing.
This chapter is where some Christians get the mistaken notion that the fleece trick might actually work. It worked for Gideon.