If I can feel my rib cage, does it mean I have underdeveloped abs

By A Mystery Man Writer

Tips for How to Get a Six Pack: Surprising Muscles to Exercise

The Myth of Unequal Leg Length (Functional Leg Length Discrepancy)

Should I work on my abs first or work on building muscle and abs

Why do the rib cage of guys with six pack abs not visible even when they are having very low body fat percentage? - Quora

Signs of abs or just a wide rib cage? : r/xxfitness

Pain under left rib cage: What you need to know

Is it possible to have underdeveloped lower abs? - Quora

Can you build muscle to stop your ribs from showing? - Quora

Will I get a flat stomach with a big rib cage? - Quora