Why Is There a "B" In the Word "Subtle"?

Why Is There a "B" In the Word "Subtle"? a song by DAGS! on Beatsfy

Chega De Saudade by DAGS! ,
We All Like Theories, Let's Not Make Anything Ever Happen by DAGS! ,
I Would Love to Send All Those Shitheads Wearing Camo to the Actual Army by DAGS! ,
Dance Today, Dance Tomorrow, Why Not the Day After. by DAGS! ,
Punching Above Your Height by DAGS! ,
Why Is There a "B" In the Word "Doubt"? by DAGS! ,
Fall & Fracture by DAGS! ,
For Instance Does Any of Those "I" I Put in a Sentence Make Me Look Like an Egotistical Prick? by DAGS! ,
Why Is There a "B" In the Word "Debt"? by DAGS! ,
In Order to Have Survivors You Need Patients. In Order to Get Patients You Need Survivors by DAGS! ,
Why Is There a "B" In the Word "Subtle"? by DAGS! ,