It doesn't take very long, does it?
" ... something like a rat giving birth to a cat" would disprove evolution. To be precise.
You mean the next time a rat gives birth to a cat I can't even count that as proof for macro evolution? That's quite deflating.
Hebrews 11:1 says:
Now faith is the substance of things hoped for, the evidence of things not seen.
Unless the macro evolution believer has seen macro evolution actually occur in that they have actually seen the process of one kind of life giving rise to another kind, I will regard their science as a faith as faith is described in Hebrews 11:1.