The British driver asserts that "every competitor on the starting lineup" would have attempted the move that sparked fresh controversy between Norris and fellow driver Oscar Piastri during the recent race.
Norris made contact with his teammate on the corner exit of the third corner at Marina Bay after a bump with Max Verstappen's Red Bull caused him to slide.
This incident could potentially disrupt the carefully maintained team unity that McLaren has successfully preserved between their two drivers through strategic leadership.
Before the race, the British driver trailed his teammate by a significant margin in the points table, and narrowed that gap by only a small amount after taking the final podium spot behind winner George Russell and Verstappen, with his teammate close behind in fourth position.
Norris insisted he had acted appropriately in passing Piastri.
"Every driver on the grid would have done what I did," he stated. "If you criticize me for taking a racing gap, you shouldn't be in F1.
"I was a bit too close to Max, but that's competition. No major incident occurred, I'm certain I would have finished in front of Piastri regardless because he had the less favorable part of the track on the outside.
"Naturally I need to analyze it and the worst scenario I want is collision with my racing partner. I am the one who must avoid such situations. I would put myself at risk just as much if similar things happened.
"I'll review it but the governing body clearly thought it was fine and the McLaren did, as well."
Norris denied he had been too forceful with Piastri. "I made contact with Max," he explained, "meaning I wasn't forceful with my racing partner."
Piastri expressed unhappiness about the collision. He communicated over the in-car communication that the squad's choice to do nothing about it was "unjust."
After the race, he was more measured, saying he needed to watch the incident before commenting further.
"The primary issue is two cars coming together," he commented. "That's never what we want, so I'll examine it in greater detail."
The Australian has previously been the driver to suffer in at least two controversial situations this season.
In Hungary, he was the leading McLaren driver initially but his teammate was permitted to use a different strategy to overtake his teammate, a decision that competitors have questioned.
And in Italy, the Australian was instructed to let Norris back past for P2 after the Briton was delayed by a lengthy service. Piastri expressed concern that he believed there had been an agreement that a slow pit stop was just normal competition that had to be tolerated, but acquiesced anyway.
Internally, he was not pleased about that circumstance, and he and the team conducted talks to address the matter.
But questioned after the Singapore Grand Prix whether he had any concerns that Norris might be getting favoritism, Piastri responded: "No."
Was he convinced the squad had been fair throughout the championship?
"In the end, yes," he stated. "Might situations have been better at certain points? Certainly, but ultimately it's a developmental journey with the entire team and I'm very happy that the aims are positive, if that makes sense."
McLaren boss Andrea Stella said: "We'll have detailed analyses, productive conversations and, like after Canada, we'll return more resilient and more cohesive."
The team principal explained that although the squad had reviewed the incident in its direct consequence, "this contact is, actually, a consequence of another racing situation that occurred between Norris and the Red Bull driver."
Stella added: "Piastri made some comments while he was in the cockpit but that's the kind of attitude that we want from our drivers. They have to make their position clear, that's what we require of them.
"Our analysis needs to be extremely thorough, very analytical, it needs to take into account the perspective of our two drivers, and then we will develop a shared understanding upon which we will determine whether we can simply validate our initial interpretation or there's something else that we should conclude.
"Whenever we start our conversations with the competitors, we always recall, as a premise: 'This is difficult'.
"Because this is the only matter in which, when you compete as teammates, in fact you can't have identical objectives for the both competitors, because they seek to achieve their personal goals. This is a core concept of the approach we take at McLaren.
"We must remain accurate, because there's a lot at risk. That's not just the valuable points, but it's additionally the confidence of our drivers in the manner we function as a squad, and this is, perhaps, more fundamental than the championship standings."
The controversy deflected attention from the British team winning the constructors' championship for the second year running.
It is the team's 10th constructors' title, moving them ahead of Williams in the all-time list into runner-up position behind record-holders the Italian team, who have won it 16 times since the championship's inception in 1958.
Their victory represents one of the earliest times a team has done this. It equals Red Bull's feat in winning with six races to go in 2023, although that was a 22-race season compared with 24 this year.
The team's lead has reduced as the championship enters its concluding phase. That is due in part to the nature of the three most recent circuits not favoring its capabilities, and also because McLaren ceased the upgrade process earlier, while their rivals still have new parts coming to their vehicles.
That decision by McLaren was based on the reality that they were experiencing diminishing returns in improving this vehicle, common when a design has such an edge at the beginning of a championship, and that they wanted to make certain they were well prepared for the following season.
The British driver, though, is well aware of the scale of his squad's accomplishment, and the remarkable turnaround they have demonstrated under Stella and CEO their leader from just over two years ago, when they started the 2023 season close to the back of the grid.
"Another title is a great thing," he commented. "Looking at where we were previously, we have outperformed every squad in terms of development in a period when it is harder to achieve with more restrictions and reduced testing.
"In an era when it should be harder than before to excel, that's exactly what the team has accomplished and given us, clearly, the fastest vehicle on the starting lineup.
"It's consistently a pleasing aspect to mention. It always puts a smile on your expression. But we've also excelled as a team in terms of drivers, between Oscar and me {pushing each other
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