Today I came across 2 sentences like this "Da bin ich mir sicher" and "Dessen bin ich mir sicher" What do "Da" and "Dessen" mean in these and please tell me if these 2 sentences are grammatically correct or just colloquial also we can't use "Das" instead of "Da"
1 Answer
Some verbs can have an object in Genitiv case. For example the reflexive verbs "sich entsinnen", "sich bewusst sein", and "sich sicher sein":
Ich bin mir [des Regelwerks] bewusst.
Ich kann mich [des Regelwerks] nicht mehr entsinnen.
Ich bin mir [des Regelwerks] sicher.
We can replace the noun with a demonstrative pronoun:
Ich bin mir [dessen] bewusst.
Ich kann mich [dessen] nicht mehr entsinnen.
Ich bin mir [dessen] sicher.
Let's rephrase by putting the genitive object into the Vorfeld (the first position of the sentence in this case), and the subject into the Mittelfeld:
[Dessen] bin ich mir bewusst.
[Dessen] kann ich mich nicht mehr entsinnen.
[Dessen] bin ich mir sicher.
So, your second sentence is perfectly fine! It is nothing more than a demonstrative pronoun in the Genitiv case. What it refers to, however, is something you can only know from context - most likely the preceding sentence.
For your first sentence, I thought of similar constructions.
Ich bin [davon] überzeugt.
[Davon] bin ich überzeugt.
*[Da] bin ich überzeugt [von]. (colloquial)
... came to mind.
It makes clear, what "da" is supposed to be: A Pronominaladverb! In fact, your first sentence is colloquial!
To sum it up: First sentence is colloquial, second one is standard German.
-
2A stray da commonly refers to the situation as a whole. If I had to translate it, in this example I would put it as That in mind, ….– JankaFeb 5 at 7:55
-
@Janka: Indeed, if I had to "expand" "Da bin ich mir sicher." into a "longer form" to express the same sentence, I'd first think of "Bei dieser Sache bin ich mir sicher." Feb 6 at 11:11