Labour MP Mike Gapes and Conservative MP John Baron put both sides of the argument.
Token engagement would be equally damaging to both the west and to Syria. We should consider the costs of leaving the regime in the place.
There is nothing dishonourable in choosing between a bad outcome and a worse one. The risk remains that by intervening we will both widen and intensify the conflict.
Why do so many still suggest that Russia and China should determine our foreign policy?
While leaving the door open to military action, the party's MPs know that the evidence required to justify intervention hasn't been presented.
The public opposes military action by 50 to 25%, with Labour supporters the most hostile of the three main parties.
Shadow public health minister says intervention "would put me in a very difficult position" as Labour signals it will whip MPs in support of Miliband's stance.
PM says there will be a vote on Thursday on a government motion on UK action in Syria.
Shadow foreign secretary says he is "unconvinced" of the case for an air campaign and criticises William Hague for "implying force is inevitable".
Ewa Jasiewicz reports on the plight of the relief efforts in Syria.