A ciencia cierta

(sayings & idioms)
B2 (¡Nivelazo!)Used EVERYWHERE 🇲🇽Standard Spanish 😌

🧠 What it means

This useful chunk just means you know something with 100% certainty, like scientifically proven, bulletproof, no doubts allowed! It translates well to: 👉 for sure / with absolute certainty 💡 Funnily enough, in everyday conversation it’s often used to say the opposite… i.e., that you DON’T know something a ciencia cierta. So yeah, you’ll often hear things like: No lo sé a ciencia cierta. I don’t know for sure.

🌪️ When to whip it out

Whenever you’re not 100% sure about something and want to sound thoughtful and well-spoken:

No sé a ciencia cierta qué pasó.
I don’t know exactly what happened.
Nadie puede decir a ciencia cierta si va a funcionar.
No one can say for sure if it’ll work.
Lo sé a ciencia cierta
I’m 100% sure.

⚠️ Tone

✅ Formal-ish, so great for work or academic settings.

✅ Great for sounding articulate in debates, interviews, or thoughtful convos.

✅ Totally safe in all contexts.

🔁 Similar chunks

Con certezaCon seguridadSaber bienEstar seguroQue yo sepa100% seguroTotalmente seguroMe consta que

🦜 El Rincón del Cotorreo

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