Don't focus on the imposter syndrome itself. If you do, you'll assume the solution is to learn more.

In reality, the solution is to work on your fears of failure, of looking ignorant, or of being a fraud.

To be clear, you always can (and hopefully will) be discovered ignorant. It happens often as you grow as a person. You should learn to tolerate that fear and see it as normal and human, rather than something to try to destroy with extra education.

You can also learn social skills that make those inevitable situations (where you fail or are wrong) easier to deal with. If you're intellectually humble and listen to your peers' ideas, you can share in the "blame" for the defeat.