Please formalize the argument given in the following passage.

For all inferences from experience suppose, as their foundation, that the future will resemble the past, and that similar powers will be conjoined with similar sensible qualities. If there be any suspicion that the course of nature may change, and that the past may be no rule for the future, all experience becomes useless, and can give rise to no inference or conclusion…It implies no contradiction that the course of nature may change, and that an object, seemingly like those which we have experienced, may be attended with different or contrary effects…Is there any more intelligible proposition than to affirm, that all the trees will flourish in December and January, and decay in May and June?

The argument presented in the passage can be formalized as follows:

1. For all inferences from experience, assume that the future will resemble the past and that similar powers will be conjoined with similar sensible qualities.
2. If there is suspicion that the course of nature may change, and the past may not be a rule for the future, then all experience becomes useless and cannot give rise to any inference or conclusion.
3. It is not contradictory to think that the course of nature may change, and that an object which appears similar to those we have experienced may have different or contrary effects.
4. Therefore, there is no proposition more intelligible than to affirm that all trees will flourish in December and January, and decay in May and June.

In summary, the argument highlights the importance of assuming that the future will resemble the past for making inferences from past experiences. However, it acknowledges that there is a possibility for the course of nature to change and objects to have different effects, which can challenge our previous experiences. As a result, the argument suggests that there is no proposition more understandable than the statement that all trees will flourish in December and January, and decay in May and June.

Here are the central thoughts; how will you sythnesize them into one main idea?

all inferences from experience suppose, as their foundation, that the future will resemble the past

and

If there be any suspicion that the course of nature may change, and that the past may be no rule for the future, all experience becomes useless, and can give rise to no inference or conclusion…It implies no contradiction that the course of nature may change,