Fatally Flawed

I run most every morning.  I run early  -before dawn-   to avoid the heat.  Today I did not.  Midday, I decided that I should go for a run.  I reasoned, "I can run midday, (in late August, in southern Nevada) because...... A- I grew up here; I am used to the heat.  And.....B- I am a runner.  I am in good shape.  I've even run a few marathons......So C- I can run a few short miles midday in the sun."

I further reasoned, "It will be just like when I watch Luke's mid-day football games.... only running."  (Yeah, I can't believe I didn't see the flaw in THAT reasoning.) 

It turns out that I'm not so good at logic.   In this case, If A is true and B is true, it does NOT follow that A+B (or C) is true.

My logic was fatally flawed.  And I don't use that term lightly.  I thought I was going to DIE.  But I lived to tell the tale. 

I will NOT be running midday for some time (at least not until it is under 90 degrees outside.)