What it means
You think by plan, from goal to steps; you learn what will be useful in practice. Speech is restrained, weighed, with dry humor. Decisions are slow but rarely mistaken.
The flip side is pessimism and excess caution in words; it's hard to talk about feelings and about what hasn't been checked yet.
This isn't about you if you speak easily and a lot and a plan hinders you more than it helps.
How to check it on yourself
Check it against your past — write your answer down before you look at the chart.
If your Mercury is in Capricorn
What should match. Recall your last three big undertakings. For at least two you had a written or thought-out step-by-step plan before starting.
When it’s not about you. Two out of three were started without a plan, as you went — this isn't about you.
Your sign and house of Mercury — in the free calculation: build my chart. How we check the rest — the site’s method.