I hear it a lot from developers - "I know the concepts, but just not the syntax." The thinking seems to be:
There's too much out there and I can't know it all
The concepts are what really matter
The syntax is just trivial stuff that I can look up.
Therefore, the idea is that the developer knows the important stuff (concepts), and shouldn't be blamed for not knowing the unimportant stuff (syntax). Fair enough as long as you know enough syntax to get the job done. However, more often than not, I see developers who continually shrink the first category and enlarge the second. For example, I've seen developers refer to standard concepts for which they're heard the buzzword but don't understand (OOP, exception handling, n-tier architecture, client-server models, design patterns, etc..) as "syntax". Some people think this is a smart way to avoid saying "I don't know." The problem is that these things are not syntax - syntax is language specific details for a single implementation. For example, various languages can each have their own syntax to create comments. The concept is "creating a comment in code", the syntax is what you actually type to do it (such as // or /* ... */ in C#).
A general rule is that concepts transcend any one language. For example, C++, Java, and C# all use OOP, so questions like "What is an abstract class" or "What is polymorphism" are conceptual questions - they have nothing to do with syntax. Likewise, all these xml config files (like the ASP.Net web.config, or even MSBuild) have little to do with syntax - the whole point of making them in xml is to bypass any syntax problems. Rather, they're about "do you understand the problem space?" If you know the concepts to tune a web application, ASP.Net's web.config suddenly makes a lot more sense.
I realize at the end of the day, implementation requires us to know the syntax. In fact, many developers can copy and paste chunks of code without even knowing that conceptually is going on. To such a developer, everything is effectively syntax. However, there's always the benefit of being able to step back and differentiate between the two.