You can make an argument that a difference that gives some kind of advantage would be unfair. If it doesn't give any advantage, why does it matter? Your argument that "any difference equals [an] inequality" is nonsense. Some differences might potentially equal an inequality, yes, but not all.
Of coerce "any difference equals [an] inequality," no matter how small, irrelevant, or subliminal the difference is, these all affect our psychological response to input (video & sound in the case of doom) which then create a difference in our physical response (the way we move the controller, mouse ect). If someone was to use a foreign computer (a computer other than my own) and load Chocolate-Doom on it and launched the game, I would not be able to tell if it was Vanilla or Chocolate-Doom because they're so similar. Let's say I played through map 1 of Doom 2. Now, let's say the God of the universe made the world go back in time and then changed one thing, Vanilla Doom was loaded on the foreign computer instead. When I sat down and started playing though map 1, I can guarantee you that I would have played a few tics differentially. This is because of the small differences which caused my mind to react differentially, and thus causing a different physical response.
You'll probably say that that's an insane example and making a fuss about the small differences in action during each tic is ridiculously extreme and does not qualify as any rational reason to disallow source ports at COMPET-N. I see your view but when things are taken to their extreme, you found out their truths, and it is true that Chocolate-Doom will give off a slightly different psychological response than Vanilla Doom.
Plus you've contradicted yourself: playing in DOSbox is different to playing on a real DOS machine (mouse behavior is different). If "any difference equals [an] equality" then that is different too.
Both the player on the real DOS machine, Windows 98, and DOSBox, all have the same potential because they're using the exact same executable (Vanilla Doom). Yes the fact that they're all using different systems causes a massive difference in the psychological response, way different than the difference between Vanilla and Chocolate Doom, and in an ideal world, we would have everyone competing against each other on the exact same EXE and system, but there's no way we can get everyone to go and buy the exact same system. We can however have everyone use the same EXE. It's not an absurd thing to say that everyone must use Vanilla Doom in they want their demos to be valid. It is absurd to say that everyone must use the exact same system.
With this comment you've not only failed to answer this challenge, but clarified that it doesn't matter to you. You've basically admitted that your desire to exclude source ports does not serve any rational purpose.
I already admitted to that a long time ago...
Anyways, I understand that my opinions and beliefs are in many ways unrealistic and and irrational, but they are my opinions and I will state them and defend them, as they [,perhaps irrationally,] mean very much to me. COMPET-N's been a big part of my life, and I'd like to keep C-N as it always has been. If COMPET-N's old rules are just ridicules by today's standards, then let's not change C-N, but create a new organization of competition; however, I think DSDA suits that just fine.
Why are we trying to change COMPET-N? If this Source Port issue is so serous, let's make a new competition organization... but again, we do have DSDA...