May 05, 2026 · 13 min
The myth of cold email A/B testing
Most cold email A/B test lifts are sample-size theater. The timing variable swamps copy variance. Here's what's actually testable in 2026.
arthur
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May 05, 2026latest
Jan 26, 2026 · 9 min
Timing is 80% of outbound: when a buying signal is hot vs cold
Outbound timing playbook: signal half-life on Reddit, HN, and LinkedIn, what makes a buying signal hot vs cold, and the daily ritual to catch the hot window.
arthur