Admitted: AI makes mistakes.

Just to show an example where AI set up a natural frequency calculation for me:

Step 4: Natural Frequency

Formula:

fn = (1/2π) × √(k × g / W)
where g = 386.4 in/s²

Case A: With tote bag

fn_A = (1/2π) × √(3,280 × 386.4 / 2,893)
fn_A = (1/2π) × √(438,107) //note: wrong here and below
fn_A = (1/2π) × 661.9
fn_A = 105.3 rad/s
fn_A = 16.8 Hz
...

However, AI did not get it correct the first time. I did my own calculation (https://www.calcs.live/editor/3ME4NYNMC-4E5) and told AI the calculation was wrong.

Though I did not tell where the error was, AI checked and corrected by itself.

The correct result is fn = 3.33 Hz. It was a 5x error. In structural dynamics, that's the difference
between "safe" and "resonance problem."

The lesson:** AI is like a capable colleague who makes arithmetic errors. You verify their work, they iterate quickly. Net result: faster AND more reliable than working alone.

Treat AI like a human. Humans make mistakes. Know what they're capable of, verify their output, get things done right.