sin atisbo de duda

Meanings:

1.
Pan-Hispanicformalliterary
- Without the slightest trace or hint of doubt; used to assert that something is believed or known with complete certainty.

ES: Yo sí, sin atisbo de duda
EN: Oh, I know. I definitely know. No question about it.
ES: Bueno, lo sé, sin atisbo de duda.
EN: Well I do, beyond a trace of doubt.
ES: Te explican por qué Dmitri es inocente, y uno lo cree sin atisbo de duda alguna.
EN: They explain why Dmitri's innocent, and you say he is innocent beyond a doubt.
ES: Y uno cree, sin atisbo de duda alguna, que mató a su padre.
EN: And you say without a doubt that he killed his father.