"In a political debate the
man who is forming a judgement is making a decision about his own
vital interests. There is no need, therefore, to prove anything except
that the facts are what the supporter of a measure maintains they are.
In forensic oratory this is not enough; to conciliate the listener
is what pays here.

conciliate
vt.
3at#ed, 3at#ing 5< L conciliatus, pp. of conciliare, to bring together, win over < concilium, COUNCIL6
1 to win over; soothe the anger of; make friendly; placate
2 to gain (regard, good will, etc.) by friendly acts
3 [Archaic] to reconcile; make consistent
—SYN PACIFY
con[cil$i[a[ble
adj.
con[cil#i[a$tion
n.
con[cil$i[a#tor
n.