Cables that measure the same but (seem?) to sound different

I have to agree if they measure the same they probably sound the same. How many of the people you mentioned have done properly conducted listening tests which is one way to reinforce their position?

+1 @jea48

have you tried nulling ? IF they are the same, output = zero…..

 extended dialogue with a certain objectivist who continues to insist to me that if two wires measure the same, in a stable acoustic environment, they must sound the same.

There is a large faction of todays people who are totally clueless about man's human nature. It shows itself in society & the way these people come  to irrational conclusions.

I would agree with the statement "if two wires measure the same, in a stable acoustic environment, they must sound the same." But ONLY to a MACHINE which is CALIBRATED the SAME. 

People are NOT machines! We are not all Calibrated the same. Nor are we  calibrated the same everyday due to emotional forces and other stimuli
Then also, the question arises as to what scientific proof he used to come to his conclusion that equal measurements mean the same sound? 

I'm not sure you can find two cables that measure the same.
Impedance of the cable will change with frequency.  It is also very difficult to measure capacitance or inductance since it is "distributed" inductance and capacitance - one affects another.  It can be done by measurements at different frequencies and calculations, but it might be not very accurate.  Even such simple thing as DC resistance will change with temperature increase (with current).  Metal and construction of the cable make a difference.

After that you have other effects, like dielectric absorption or skin effect (that starts at gage 18 for copper at 20kHz).  12 gauge wire uses only 75% of it size at 20kHz (Belden data).

In addition construction of the cable is important.  Even speaker cable is electrical noise entry into amplifier.  Twisting of the wire, including twist pitch plays a role.  How do you measure quality of interconnects shielding?

Of course, one can say "It measures close enough" or "it should not matter", but it is only an opinion and not a proof.  IMHO, the only sure way to find two cables that measure exactly the same and have exactly the same noise rejection is to buy the same cable twice.

When you hear a difference between cables it means they must be different (measure different, different construction etc.)
The only other possibility is placebo effect, but there is nothing wrong with it, as long as it works :)

I would not dare to tell other people what they can or cannot hear, especially when my hearing is not getting any better with age.