「doubt」と「suspect」の違い

When I was in Sydney last month, I ate at this nice Taiwanese vegetarian restaurant:

http://www.motherchusvegetarian.com.au/

It's a chao shao bao, but instead of barbecued pork, it's a vegetarian version with textured soy protein. The spices they used were great, and it was steamed just right.

× You might doubt that it's meat, but it's not.
○ You might suspect that it's meat, but it's not.

Remember that "doubt" means "think not", but "suspect" means "think".

• doubt ～を疑う◆否定的に (definition from Eijiro on the Web)
• suspect ～を疑わしく思う、～を本当ではないと思う、～を信用しない (definition from Eijiro on the Web)

Both of them are usually used for bad things. For example, I wouldn't say:

× I suspect that the weather will comfortable tonight.
○ I think that the weather will comfortable tonight.

The owner is Mother Chu. I got to talk with her some over the few meals that I ate there, which was a real pleasure. She is in her early 90s, so she could speak Japanese as well. We had a conversation in Chinese and Japanese about what it used to be like in Taiwan and in Sydney, where she has lived for 30 years (I think that is what she said). She even sang an old Japanese song for me.

You might doubt that a woman in her 90s could still work in a restaurant, but Mother Chu was sitting at a table and spoke with many of the customers, though I suspect that she probably doesn't bus tables or do much work in the kitchen. I recommend stopping by her restaurant if you are ever in Sydney. I doubt you will be disappointed.