Knife feat;
Ayanokoji had to remember multiple events which happened days prior AFTER the observation (after he observed Hosen's knife, he remembered firstly Ichika bought the knife way too quickly as if she already planned on buying it beforehand, and then remembered that she got into his kitchen because she left her hair tie there). So here he had to remember multiple events which happened days prior and on different days too.

So after both of these observations he tied them together to that Ichika is the one who made the strategy and Hosen is executioning it.
Line 1 conclusion through these: Hosen's knife is his own. And Ichika is working with Hosen. (Reasoning)

Line 2: Hosen is trying to frame Ayanokoji to expel him. 

Clue 1: The whole ordeal looks weird to Ayanokoji, him doing this all didn't make sense and looked far too targeted. (Thinking)
Clue 2: The knife is his own (this line could only be possible to notice after finishing Line 1) and obviously it means it has his own fingerprints. (Thinking)
Line 3: Hosen is gripping the knife in a weird fashion that would seem like he'll swing down, this is far too weird when usually people slash or stab with it and they use different grip. (Observation + Analysis)

Line 2 conclusion through these: Hosen was trying to expel Ayanokoji by stabbing himself with his knife. (Reasoning)

Line 3: Hosen is NOT a WR student
[3:07 PM]
Clue 1: WR student will likely be discreet about their intentions as they go against him, the Masterpiece. (thinking)
Clue 2: The WR wouldn't allow that method as it's too risky and can be a scandal which can in future reveal the WR (analysis)
Clue 3: Hosen was executing Ichika's strategy and only is here to get the reward (this line again can only be unlocked after Line 1 and Line 2) (logical reasoning + analysis)

Decision Making: Even if Ayanokoji stops the knife Hosen can just try again for example.
Letting himself get stabbed will get his own blood on his clothes and Hosen's fingerprints are also on Ayanokoji's knife and on his hand and knife is his blood.
Since Hosen isn't a WR student, if he lets himself get stabbed Hosen will have to do whatever he can to not get expelled for it.
(Also only possible after all 3 Reasoning line's and observations + remembering happens)
He was able to think of the future merits as well for it.
[3:07 PM]
So let's go about the information in this feat: Aside from 3-lines in the reasoning (which can only be open once Hosen swings down his knife as I explained and the WR one can be expanded possibly since Ayanokoji knew for sure it's not Hosen who is a WR student due to this), 2 observations, a huge decision of getting himself stabbed, thinking of the future merits (As Hosen noted he thought far ahead), uncovering that Ichika was with Hosen in that strategy. Likely the other very underrated aspect of this feat is the fact that Ayanokoji remembered in that moment about 2 things regarding Ichika: 1. She bought the knife too fast and it was a cheap one too. 2. She left a hair tie in his kitchen and got into it after the cooking was done. 
Now what's impressive about it, he'd have to remember all the moments of the time he had that knife and being together with Ichika as well as the store which happened days prior. Then arrange that information and also put it into the piece of the puzzle of this situation.
Now for the timeframe:

As I explained and proven he could only start the process once Hosen started swinging his knife to see the grip and the knife.

(My friends Calc and he gave permission to share klemen19)

S = 0.90262176987 / 0.00031536404

S = 2862.15818985 m/s or Mach 8.344485

(Hypersonic)

 This is the speed of Hosen's swing. The first 5 screenshots and the text.

This is how much Hosen was able to swing down the knife:

 Sadly by Y2 Manga since we can't see it in the Novel but: Hosen's swing was 0.38m. 

Meaning that whilst with 1 meter swing and 409 M/s speed I had a timeframe of 1/500th of a second. Now it goes to a way higher level with new speed of 2862 M/s and range of 0.38m.

Meaning this feat now goes to approximately 1/9200th of a second timeframe.
[3:07 PM]
So all of this which I'm replying to. All the information, remembering, observations, decision makings etc were done in ~1/9200th of a second. Making it an insane feat because by proportions it means in a second he could make 9200th 3-line reasonings with multiple observations and insane memory usage (which can be considered a WMI by the definition we agreed upon)