Can, in some instances, conclude and decide be used just about interchangeably as far as AmEng goes?
Please, consider the following examples:
The committee concluded on a plan of action.
The committee decided on a plan of action.
We decided to postpone our vacation for a week.
We concluded to postpone our vacation for a week.
We found some stale bread, which we decided to eat.
We found some stale bread, which we concluded to eat.
He decided that dinner would be at 7 o'clock, and asked guests to arrive at 6.
He concluded that dinner would be at 7 o'clock, and asked guests to arrive at 6.
to infer on the basis of evidence : conclude they decided that he was right.
To make a judgment or determine a preference; come to a conclusion decide on where to go.
To reach as a logically necessary end by reasoning : infer on the basis of evidence *concluded that her argument was sound.
To make a decision about : decide concluded he would wait a little longer
To decide, determine, or resolve: He concluded that he would go no matter what the weather.
To arrive at an opinion or judgment; come to a decision; decide: The jury concluded to set the accused free.
To decide; determine.