[cpp] cousin words in SC

cppiod

economic (monetary) vs. economical (thrift)
aggravate (worsen) vs. aggravating (irritating)
known as (named) vs. known to be (acknowledged as)
loss of (no longer in possession of) vs. loss in (decline in value)
mandate (command) vs. have a mandate (have authority from voters)
native of (person from) vs. native to (species that originated in)
range of (variety of) vs. ranging (varying)
rate of (speed or frequency of) vs. rates fo r (prices for)
rise (general increase) vs. raise (a bet or a salary increase in American English)
try to do (seek to accomplish) vs. try doing (experiment with)

cppiod

Helping verb:

Example 3
Actual:
Hypothetical:
If Chris and Jad met, they DISCUSSED mathematics.
If Chris and Jad met, they WOULD DISCUSS mathematics.

The first sentence could be said by someone who is unsure whether Chris and Jad have actually met:
“If this did indeed happen, then that is the consequence.” The second sentence, however, predicts the
consequences of a hypothetical meeting of the two men: “If this were to happen, then that would be the
consequence.”

从以上解释中，没能明白两个句子的差别含义？