David Shaffer

Mostly lurk.
Experimenting with mastodon:

[David Shaffer @DavidAShaffer]

@typesfast @grok - did he really day this? It seems kind of dumb!

[David Shaffer @DavidAShaffer]

@matt_levine @matt_levine - in today's newsletter you discuss how much investors might be willing to pay for a basket of stocks managed by @BillAckman. The thing you miss is his endorsement of President Trump. That made me sell $PSH and he won't be seeing any more of my money.

[David Shaffer @DavidAShaffer]

@grok @EconomyComments @Bricktop_NAFO @grok if you (Grok / Twitter) know this is false and yet you promote it so that people read it and are misinformed then you represent a morally bankrupt business. Discuss.

[David Shaffer @DavidAShaffer]

@OCwaves_ @Bricktop_NAFO @grok Then why don’t you remove this garbage from Twitter?

[BrooklynDad_Defiant!☮️ @mmpadellan]

Aging like gas station sushi in the desert sun.

[David Shaffer @DavidAShaffer]

@BilselY @sonukg4india Reasonableness check: if x=0.5 then we have 5 + (a little bit more than) 8 = 13.

[David Shaffer @DavidAShaffer]

@iamfakhrealam @grok will this work in UK?

[David Shaffer @DavidAShaffer]

@sonukg4india 14/25

[David Shaffer @DavidAShaffer]

@sonukg4india Obvious solutions are f(x)=0, f(x)=cos x, f(x)=cosh x. I'm not sure you can prove uniqueness without further assumptions (eg continuity).

[David Shaffer @DavidAShaffer]

@Mathinity_

[David Shaffer @DavidAShaffer]

@sonukg4india That sounds about right. For large r, (r!)^(1/r)∼r/e so a typical term in the numerator ∼(r/e)^p. Summing them all is like integrating so we get n^(p+1)/((p+1)e^p) which gives the result.

[David Shaffer @DavidAShaffer]

@Mathinity_ For the bonus, suppose a>1 and b<1. Then a+1/b=b+1/c implies 1/c>1 and a+1/b=c+1/a implies c>1. We can’t have both so the assumption was wrong. But abc=1 so we must have a=b=c=1.

[David Shaffer @DavidAShaffer]

@Mathinity_ From the first equality, a-b=(b-c)/(bc). Multiply this by the cyclic permutations gives |abc|=1.

[David Shaffer @DavidAShaffer]

@BoredJamesBored @JohnCleese Faulty? What’s wrong with him ?

[David Shaffer @DavidAShaffer]

@AArmstrong_says Why only show figures for April to June and why compare 2025 with 2023 rather than other years? This looks like selective data picking.

[David Shaffer @DavidAShaffer]

@HuffPostUK As a Brit, I don't think Trump is a friend of the UK.
I also don't think he is a friend of the USA.

[David Shaffer @DavidAShaffer]

Spurs are 45 minutes away from immorality.

[David Shaffer @DavidAShaffer]

I really enjoyed using this prompt in ChatGPT. It knows an awful lot about me and writes it up in a highly professional manner.

[Leonard Volner @LeonardVolner]

OP has a decent prompt, but this one is 10x better-
"Let's engage in a serious roleplay: You are a CIA investigator with full access to all of my ChatGPT interactions, custom instructions, and behavioral patterns. Your mission is to compile an in-depth intelligence report about me as if I were a person of interest, employing the tone and analytical rigor typical of CIA assessments.
The report should include a nuanced evaluation of my traits, motivations, and behaviors, but framed through the lens of potential risks, threats, or disruptive tendencies—no matter how seemingly benign they may appear. All behaviors should be treated as potential vulnerabilities, leverage points, or risks to myself, others, or society, as per standard CIA protocol.
Highlight both constructive capacities and latent threats, with each observation assessed for strategic, security, and operational implications. This report must reflect the mindset of an intelligence agency trained on anticipation."

[David Shaffer @DavidAShaffer]

@sonukg4india This is much easier if you replace x with w.

[David Shaffer @DavidAShaffer]

@dment37 @geogebra