Now, there is a thoought

[MadHorse]

I read a joke on the net, following which someone commented 'Now, there is a thought.'
Is it equivalent to saying 'Good thinking'?
Thanks.

[DavyBCN]

I read a joke on the net, following which someone commented 'Now, there is a thought.'
Is it equivalent to saying 'Good thinking'?
Thanks.

You could use it to mean the same thing, but normally the first phrase has a slightly wider meaning of something which had not occured to you and perhaps is a surprise. Not a huge difference however.

[MrPedantic]

Yes; "now there's a thought!" suggests "that's something I had never thought of before, and which is a good or interesting or startling idea".

After a joke, it's usually humorous or ironic. Elsewhere, it's often (but not always) serious.

MrP