Editing Aenesidemus (section)

=== The ten modes of Aenesidemus<!--'The ten modes of Aenesidemus' and 'The ten tropes of Aenesidemus' redirect here--> ===
The reasons for doubt are given in the form of the ten "tropes"<!--boldface per WP:R#PLA--> (also known as '''ten modes of Aenesidemus''' or '''ten tropes of Aenesidemus'''<!--boldface per WP:R#PLA-->) that represent reasons for ''[[epoché]]'' ([[suspension of judgment]]). :<ref name="EB1911">{{harvnb|Chisholm|1911}}</ref>

*(1) different animals manifest different impressions; 
*(2) similar differences are seen among individual people; 
*(3) even for the same person, sense-given data are self-contradictory, 
*(4) sense data vary from time to time with physical changes, and 
*(5) sense-data vary according to local relations; 
*(6) and (7) objects are known only indirectly through the medium of air, moisture, &c., and are in a condition of perpetual change in colour, temperature, size and motion; 
*(8) all perceptions are relative and interact one upon another; 
*(9) Our impressions become less deep by repetition and custom; and 
*(10) all people are brought up with different beliefs, under different laws and social conditions.

Aenesidemus argues that truth varies infinitely under circumstances whose relative weight cannot be accurately gauged. There is, therefore, no absolute knowledge, for everyone has different perceptions, and, further, arranges and groups data in methods peculiar to themselves; so that the sum total is a quantity with a purely subjective validity.<ref name="EB1911"/>