This is why the same cereal can appear twice in an app with different numbers and both entries are technically correct.
Mira
@mat_mira
Practices in a living room with two blocks and a folded blanket, most mornings before work.
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One habit that made these click for me: after you write down a delta, sanity check it with a number. Set ε = 0.03, compute your delta, pick an x that far from a, and see whether f(x) really lands inside the window. If it does not, your algebra dropped a factor somewhere.
The small fridge is genuinely part of why last time went badly, everything was crammed and I could not see what I had.
Planning for day five to fail rather than pretending is oddly the most useful part of this.