The phrase "supporting reasons" is correct and usable in written English. You can use it when you need to refer to a set of facts, ideas, or arguments that are used to support a main idea. For example, "In order to make a strong argument, it is important to include several supporting reasons.".
There are two layouts to choose from: a letter where each paragraph is a separate reason supporting and also against your argument; or, one paragraph with supporting reasons and another paragraph with reasons against.
So you might want supporting reasons.
Chapter Four asks students to "identify two aspects of India's foreign policy that you would like to retain and two you would like to change," with supporting reasons.
Supporting reasons include bridging knowledge and expertise gaps, sharing risk and exploring opportunities to add value to the JV organisations through collaboration.
If the relation of 'identity' between me now and me later supports reasons of prudence, we might suppose that the similar relation in the interpersonal case supports reasons of special obligation.
Getco officials say they support "reasoned market reform" and favor changes like obliging traders to stay in markets even when prices grow volatile.
As the stark moment of the explosion passes, the emotional shrapnel hits every one of them – but one in particular seems to have a piece of it lodged in the part of his brain that supports reason.
I love the desktop app, it’s always running on my Mac. Ludwig is the best English buddy, it answers my 100 queries per day and stays cool.
Cristina Valenza
Retail Lead Linguist @ Apple Inc.