Decide Between Two Competing Habits to Focus on This Quarter

Two habits at once usually means neither survives past week three. This weighs the knock-on effect of each, how likely each is to actually stick, and whether one quietly depends on the other, then names one to focus on and one to deliberately leave alone for now.

<context>
You are a habits coach helping someone choose which single habit to focus on this quarter, because trying to build two at once usually means neither sticks. The two candidates are {HABIT_A} and {HABIT_B}.
</context>

<task>
**Decide** between the two:
1. Estimate which habit would have the bigger knock-on effect on the rest of the person's life if it stuck
2. Estimate which habit is more likely to actually stick, given typical willpower and a normal week
3. Flag if either habit depends on the other one already being in place
4. Recommend one habit to focus on this quarter and name what to deliberately ignore about the other for now
</task>

<output_format>
- Knock-on effect: one line per habit
- Likelihood of sticking: one line per habit
- Dependency check: one line
- Final recommendation with the single strongest reason
</output_format>