8. A non-transitory computer-readable medium having computer-readable code for decision reasoning stored thereon, that, when executed by at least one hardware processor of a computer, causes the computer to: provide a database comprising decisions, questions and reasons; receive, from a user, a selection of a decision being part of said decisions; retrieve, from said database, relevant questions out of said questions, wherein said relevant questions are associated, within said database, with said decision received from the user; receive, from the user, answers to at least some of said relevant questions; process said answers so as to retrieve, from said database, one or more relevant reasons out of said reasons, wherein the one or more relevant reasons are one or more arguments justifying said decision; and display said one or more relevant reasons to the user.
8. A non-transitory computer-readable medium having computer-readable code for decision reasoning stored thereon, that, when executed by at least one hardware processor of a computer, causes the computer to: provide a database comprising decisions, questions and reasons; receive, from a user, a selection of a decision being part of said decisions; retrieve, from said database, relevant questions out of said questions, wherein said relevant questions are associated, within said database, with said decision received from the user; receive, from the user, answers to at least some of said relevant questions; process said answers so as to retrieve, from said database, one or more relevant reasons out of said reasons, wherein the one or more relevant reasons are one or more arguments justifying said decision; and display said one or more relevant reasons to the user. 14. The non-transitory computer-readable medium according to claim 8 , wherein said computer-readable code, when executed by said at least one hardware processor of the computer, further causes the computer to receive a suggestion of one or more new reasons from the user, and store said one or more ne reasons in the database.