Hi Alea.....
The MAXIMIM MACH is DEPENDENT ON ALTITUDE as
DEFINED by the FAA & BOEING in GOV SCIENTIFIC
documents presented to you!!
MAXIMUM MACH AT SEALEVEL 0.5 MACH
MAXIMUM MACH AT 35,000FT 0.89 MACH
You presented a debunkers website & a claim
by One Engineer that the Maximum Mach is NOT
Dependent on Altitude & in FACT is 0.89 MACH
at ANY ALTITUDE!
Either you Prove your Sole engineer's claim to be
True & FAA,GOV,BOEING scientific Data False or
Stop making a FALSE scientific Claim!
The rest of your stuff is Strawman......stick
to providing the proof that backs your scientific
claim or stop Calling it Science & call it what
it is........RELIGION & Ego!