pat

x = a + b where a = asthma = shortness of breath and b = pulled left pectoral muscle = chest pain on the left side radiating to the shoulder and neck.

y = cardiac disease = shortness of breath + chest pain, sometimes radiating to the shoulder and neck.

To prove x ≠ y I spent much of Friday at the Tri-Cities Medical Center Emergency Room.

This was to insure that I would not have a massive coronary on I-5, twenty miles from nowhere in the middle of the Central Valley, since we had to drive back home from Carlsbad to Mountain View so

brian1789 could catch a mid-morning flight to Atlanta for his sister-in-law's funeral.

Instead, we had massive, total, complete transmission failure on a three-year-old van. On I-5, twenty miles from nowhere in the middle of the Central Valley. At midnight.

tenacious_snail rented a van and very graciously rescued us, driving two hours each way. Our van has been towed to a dealership in Coalinga.

This can stop any time now. Really. I don't know how much more I can take.