Make Meetings a Safe Place to Discuss And Share Ideas

These are my suggestions to meeting participants in general and architects and senior developers in particular:

Give your colleague's idea 5 minutes. It could very well be the ide has merits you don't see. Letting the idea float for a couple of minutes before you shoot it down does not mean you endorse it.
Appreciate that there are no perfect solutions, all approaches come with their own set of advantages and disadvantages. Thus, make the meeting a safe place where people can share their ideas and voice their thoughts.
Don't interrupt
Don't laugh at your colleague's arguments.

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