I am sooo glad you didn't mention T2. I have done a few serious miscalculations at that corner... for which others have paid the price
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Seriously, the novice trailing driver makes a mistake adjusting to the slipstream and the "NOW earlier" braking point due to both the extra speed and the tighter radius. Typically, they will overcook it and run wide - too wide. If they get it just right... then it was probably a calculated dive bomb and is no novice - they know *exactly* what they are doing.
I agree that anyone needs overlap to do this move correctly and that is not properly appreciated. If someone is behind you and gaining it is legitimate and probably advised to take the defensive inside line at the cost of a few tenths. It will address the novice as there will be no place to go and will send a clear message to the dive bomber that you are on to them. A legitimate racer will take advantage by assuming the faster racing line and attempting an overpass on the next straight.
From @RacingGrandpa
https://f1metrics.wordpress.com/2014/08/28/the-rules-of-racing/
Quote:
5. Disputes over the apex
<... snip...>
... Today, it is generally accepted that the attacker must be at least halfway alongside the defender when they reach the apex to have a reasonable claim to this piece of track. Moreover, the attacker should not have achieved this position by carrying too much speed to make the corner — this method is called dive-bombing.