Sentence examples for has to be proven from inspiring English sources

That has to be proven over time".

"Repentance has to be proven to be genuine".

"It has to be proven that the orders for the security forces to move in... came from Mr. Suthep and Mr. Abhisit.

Mr. Issa said "perjury is a criminal charge that has to be proven, but certainly it's hard to have confidence in what this attorney general says or his people say when so often it turns out not to be true".

Furthermore, the need to establish correction factors to establish the quantitative model has to be proven.

This has to be proven in long-term follow-up studies.

I still think it has to be proven in the field.

In addition, a minimal reaction to a rectangular pulse of 300 μV has to be proven.

Feasibility of cisplatin-based polychemotherapy remains an open issue and has to be proven prospectively.

The technology itself and the applications still has to be proven.

The general applicability to a wide range of reservoir rocks has to be proven in the next step.