Learn Spanish (Latin America): Capaz que él prediga el futuro.

Capaz que is a colloquial way to express "maybe" or "might" in Latin America. It can trigger either the indicative or the subjunctive. Using the subjunctive (prediga) emphasizes a higher degree of doubt or makes the guess feel more hypothetical. Using the indicative (predice) would make the possibility feel a bit more likely or grounded.

Could I just say Capaz él prediga... without the que?

No, when you use capaz to mean "maybe," you generally need que before the conjugated verb. If you drop the que, capaz reverts to its literal adjective meaning of "capable," which requires a different structure: Él es capaz de predecir el futuro (He is capable of predicting the future).

How do I remember the subjunctive conjugation prediga?

Predecir is a compound of the verb decir (to say). Just as the present "yo" form of decir is digo, the "yo" form of predecir is predigo. Because the present subjunctive is built from that "yo" form, the stem becomes predig-, giving us prediga for the third person singular.

Is capaz que completely interchangeable with tal vez or quizás?