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Designing for testability improves software changeability.
  • Dr. Ingrid Falk-Weller
  • April 12, 2026
  • (0)
  • Software Engineering

Hard to Test Usually Means Hard to Change

I remember sitting in a dimly lit server room during my second year in industry, staring at a distributed state machine that had just deadlocked, and realizing that our entire testing suite was essentially just a collection of “hopeful” integration…

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Visualizing the multiple comparisons problem.
  • Dr. Ingrid Falk-Weller
  • April 7, 2026
  • (0)
  • Research Practice

Test Twenty Hypotheses and One Will Look Significant

I remember sitting in a windowless lab during my PhD, staring at a cluster of p-values that looked absolutely beautiful—until I actually looked at them. I had run twenty different variations of a distributed consensus test, and by some miracle…

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Graph of scheduler policies compared.
  • Dr. Ingrid Falk-Weller
  • April 7, 2026
  • (0)
  • Systems

Fairness and Latency Pull in Opposite Directions

I remember sitting in a windowless server room during my second year in industry, staring at a dashboard of oscillating latency spikes that made absolutely no sense. I had followed the “industry standard” documentation to the letter, yet my system…

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Bellman Ford and negative weights algorithm graph.
  • Dr. Ingrid Falk-Weller
  • April 6, 2026
  • (0)
  • Algorithms

Slower on Purpose, Because It Checks Every Edge Again

I remember sitting in a windowless lab during my first year in industry, staring at a production trace that made absolutely no sense. We were using Dijkstra’s for everything because it was fast, but our cost metrics were behaving like…

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Diagram showing decision trees and splits.
  • Dr. Ingrid Falk-Weller
  • April 6, 2026
  • (0)
  • Machine Learning

Every Split Asks One Question and Commits to It

I spent three years in academia watching brilliant researchers treat decision trees and splits as if they were some mystical, impenetrable black box. I’ve sat through seminars where people used ten-dollar words to describe a process that is, at its…

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Defensive programming limits in input validation.
  • Dr. Ingrid Falk-Weller
  • April 5, 2026
  • (0)
  • Software Engineering

Validating the Same Input Five Times Hides Where It Should Happen

I remember sitting in a windowless server room three years ago, staring at a distributed trace that looked more like a bowl of tangled spaghetti than a logical execution flow. We had spent months layering every possible null check, bounds…

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High context switching cost in CPU threads.
  • Dr. Ingrid Falk-Weller
  • April 5, 2026
  • (0)
  • Systems

Switching Threads Throws Away a Warm Cache

I remember sitting in a windowless lab three years ago, surrounded by the rhythmic, metallic clicking of a disassembled Curta calculator, trying to debug a distributed consensus protocol. I had exactly twelve tabs open, three Slack channels pinging with “urgent”…

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Dijkstra and its assumptions with negative edges.
  • Dr. Ingrid Falk-Weller
  • April 4, 2026
  • (0)
  • Algorithms

One Negative Edge Breaks the Whole Guarantee

I remember sitting in a windowless server room during my second year in industry, staring at a routing table that made absolutely no sense. We were chasing a phantom bug for three days, assuming our shortest-path logic was flawless, only…

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Logistic regression explained: predicting probability.
  • Dr. Ingrid Falk-Weller
  • April 3, 2026
  • (0)
  • Machine Learning

Predicting Probability, Not Category

I remember sitting in a windowless graduate lab five years ago, staring at a textbook that tried to explain logistic regression through a dense thicket of calculus and abstract probability distributions. It felt like the author was trying to hide…

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Visualizing confidence intervals in reporting data.
  • Dr. Ingrid Falk-Weller
  • March 30, 2026
  • (0)
  • Research Practice

A Range Communicates Honesty That a Point Estimate Hides

I remember sitting in a windowless seminar room during my PhD, watching a senior researcher present a single, glowing point estimate as if it were an immutable law of nature. He spoke with such absolute certainty that the room practically…

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