The proof to the contrary is that there is not complete unanimity on interpretation and without an authority other that what it means to the individual your interpretation is no more valid than mine or Pol Pots.
"Now I exhort you, brethren, by the name of our Lord Jesus Christ, that you all agree and that there be no divisions among you, but that you be made complete in the same mind and in the same judgment." - 1 Corinthians 1:10
Should we take a vote?
That’s evidently what the RCC does in making its decisions.