If a recipe calls for lemon juice can you substitute vinegar instead?

You know whats funny? Somebody I know had the exact same problem the other day for salad dressing. Luckily they had lime juice in the fridge. Use that! It tastes exactly the same! (at least in salad dressing!). DONT USE VINEGAR! I have no idea where you're getting that information from. Vinegar is way to bitter and strong. No, lemon juice is way sweeter that vinegar. Well the meal will be very bitter even compared to lemons but there are some ways my mum cooks vinegar and it tastes almost sweet. Look it up in a cook book or something. there are other ingredients so not just hot vinegar (yuk be careful).