Doubt, Disbelief, Denial [subjuntive] vs. Certainties [indicative]

dudo que

I doubt that - SUBJUNCTIVE

No creo que

I don’t believe that - SUBJUNCTIVE

No estoy segur@ que

I’m not sure that - SUBJUNCTIVE

No es verdad que

It’s not true that - SUBJUNCTIVE

Es posible que

It’s possible that - SUBJUNCTIVE

Es imposible que

It’s impossible that - SUBJUNCTIVE

Es probable que

It’s probable/likely that - SUBJUNCTIVE

Es improbable que

It’s improbable/unlikely that - SUBJUNCTIVE

quizás

maybe/perhaps [with a q] - SUBJUNCTIVE

tal vez

maybe/perhaps [with a t] - SUBJUNCTIVE

Es cierto que

It’s true that [with a c] - INDICATIVE

Es verdad que

It’s true that [with a v] - INDICATIVE

Es obvio que

It’s obvious that - INDICATIVE

No dudo que

I don’t doubt that - INDICATIVE

Creo que

I believe that - INDICATIVE

Pienso que

I think that - INDICATIVE

Estoy segur@ de que

I am sure that - INDICATIVE