1.   He must have been gouging for half an hour when an idea seemed to strike him.

2.   Often ideas just seem to creep up on you.

3.   The idea seemed absurd.

4.   The idea seems rather old-fashioned now.

5.   His ideas seem harmless enough.

6.   The idea does seem a bit silly.

7.   Your idea seems a bit daft to me.

8.   These ideas may seem fanciful, but Price justifies such speculation as leading us to consider and test new hypotheses which might otherwise not have been considered.

9.   On the contrary, it is quite easy to make that idea seem foolish.