why is alternative hypothesis said to be “supported” but not said to be “proven”?

Question

Is it because of the statistical procedure to prove statement or is it the bid involved in supporting certain confidence? Thanks

Answer 1

1) Nothing is ever proven. You can speak of something being likely or unlikely.

2) The alternative hypothesis is supported when the null hypothesis is unlikely to have occurred simply by chance (usually at the 1 or 5% level)