Brittle and tenuous can both cast doubt on a business case, but they identify different problems. Use "tenuous" when evidence is weak or a link is slight. Use "brittle" when a plan seems sound yet may fail under stress.
Quick check
Weak evidence or weak tolerance?
You know "Brittle" well.
Keep going with the full learning path — more workplace contexts, related expressions, and practice using it yourself with feedback.
Continue with "Brittle" →There's more to "Brittle" than it seems.
You've got part of it, but the full learning path goes deeper into its nuances, workplace contexts, and when it sounds natural — then gives you practice using it yourself.
Learn "Brittle" in depth →The test: weak from the start, or solid until a stressor hits?
Calling a case tenuous questions the evidence behind it. Calling it "brittle" questions how the plan will handle change. Because the words can overlap, explain the facts behind your concern.
A polished business case based on one informal prospect call has "tenuous" support. The team needs more evidence before it relies on the claim.
"Brittle" fits a plan that works only if one supplier, forecast, or system behaves as expected. A small change could make the plan fail.
The common mistake: calling weak evidence "brittle"
Calling weak evidence "brittle" can hide the actual problem. The case may need stronger evidence rather than only a stress test. State what evidence exists, its source, and what remains unknown.
Use the distinction to compare present support with future risk. If the support is already weak, use "tenuous." If the plan depends on narrow conditions, use "brittle." Then suggest a response that fits the concern. The team might gather more evidence, test key assumptions, add a backup, or revise the decision.
Try it yourself
Stress-test Paloma's well-supported launch plan
Practice scenarios
Practice using brittle in situations like:
- telling a thinly-evidenced case ("tenuous") apart from a solid-looking one with a hidden risk ("brittle")
- asking for better evidence on a tenuous case instead of proposing a stress test meant for a brittle one
- catching "brittle" used to describe a case that was actually weak from the start
Useful practice phrases:
- "That case is tenuous -- the only evidence is [thin source]."
- "The plan looks solid, but it's brittle if [stressor] happens."
- "That's not brittle, it's tenuous -- the evidence itself needs strengthening."
Want to actually use "Brittle" naturally at work?
Understanding it is one thing. Practice its nuances, see how it works in real workplace situations, and use it yourself with feedback.
Start the "Brittle" learning path →"Tenuous" often calls for better evidence, while "brittle" often calls for a stress test or backup. The more exact word helps others review the claim and choose a useful response.